Heres the background:
I'm a huge geek within the poli sci department at my university, absolutely love what I'm studying. I was attending a special guest lecture last thursday. I just transfered schools so I dont know many people and havent really done much yet this semester. The lecture ended around 10:00pm and I was going to head home when I walked by the school lounge, it was packed (I guess every thursday night they host a huge party for the students) I wasnt really in a great mind set for partying, I was thinking about the lecture topic, but I decided "what the hell no cover, lets go." Now first of all, I wasnt going in with the intention of picking up women I just thought i'd have some drinks, meet some people and just hang out. Second, I'm hardly a pick up artist, I'm certainly not a total chump but by know means am I smooth or talented with women. So, I go in get some beer sit down by the dance floor and drink, people were very friendly coming up and chatting and in general I was having a good time. At around midnight I notice the dancefloor was jam packed full of women and decided, mostly because I was drunk, that I would jump in and see if I couldnt get one of these girls. Now, I am defidently not a dancer, I'm stiff and ackward even when I'm drunk, but once again I just thought "what the hell."
The Girl:
So I'm dancing on the floor completely alone, I'm usually comfortable with this I go to bars alone frequently and it doesnt bother me. I notice a girl to my right, hb 7, and who seems to be alone as well, and over the next few minutes she moves closer and closer. Within five minutes we are grinding, and I continued to touch her and become more overtly sexual with her. After about 4 or 5 songs i'm tired and thirsty and suggest we get a drink (up to this point we hadnt spoken) she says "yes" and we introduce ourselves, I also find out shes a german exchange student, making fun of foreign accents is defidently gold. We have a drink, talk and laugh things seem to be going well, then we go back to dancing until the place closes. I end up walking with her back to her dorm (I live in a house in the opposite direction) the entire way she is clinging on to me, we are laughing and joking and wrestling around. She's totally digging me, and shes not bad herself. We get to her residence building and she lets me in totally casual and I walk her right to her door, she then turns around and plays with her hair, we joke around some more. At this point I feel if my game was better I could've gotten through the door, but its not so I ended up getting a number and leaving.
Day 2
The following Sunday (today) we decide to go out together, I like casual dates where I can bale any time or find distractions if things arent going well, so I take her to the zoo. (close to my house, plently of things to point at and say "hey look at that!" and then run away) The entire aura to this date is very different, she is ackward and so am I, not one time do we make physical contact, The conversation is friendly and fun but defidently not going anywhere. She alludes to the fact that her mother is an important member of their church, from which I gather she is quite religious. (uh oh I'm a staunch atheist) Everytime I mention an incident involving the two of us being physical at the bar the previous date, she blushes and sometimes puts her head in her hands. I'm basically getting the "i'm a total good girl vibe" which I'm not sure I'm buying based on her dancing style.

I have a couple questions:
1: On the first night, what should I do to get past the door? I feel like it was possible to get the f-close but I lacked the game? can someone give me the at the door game 101?
2: Why did the second day turn so friendly? Was it the lack of alcohol keeping us from releasing our inhabtions? or should I have pushed and been more forward?
3: where do I go from here? Do I call it game over? Should I pursue a day 3? If so should I go after it or should I wait for her to come to me?
Any thoughts would be good.

1. tell her that you have to show her your collection before she leaves, or your new computer or summat. anything really doesn't matter. have something in your room that you'd want to show her. and then when you're inside bit by bit sexually escalate.

2.firstly, because you went to a zoo? i mean you said it yourself that you wanted it to be casual. so she perceived it that way as well.
also, when you're talking with her and you don't agree with her don't be afraid to break rapport, cause that's what makes the whole interaction stay in a friendly level. i'm an atheist as well and when a girl tells me she goes to church and believes in god i'll tell her i don't believe. i'm not going to bash her religion completely and tell her it's a fairy tale. but you can say: "then we should stop hanging out. you're a good girl that goes to church etc. i don't think it's going to work between us"

3.what i would is txt her: "so yesterday was a bit boring... you need to make it up to me" or summat. then when she responds tell her you have an exciting afternoon planned for tonight. don't tell her what it is just where to meet you. wherever you go in this date is not important just from the start you should set a sexual frame and continue to escalate.

sorry i posted on the wrong thread

Thanks for a solid reply man, just a couple more things
1: I was actually at her house, so I dont think mentioning I have something cool at my place would've worked. The question is: how do you get a girl to invite you into her place when your standing at the door?
2: I defidently dont hesitate to disagree or even be confrontational when it comes to my political and religious views, and it was no different here. I pulled out an Angela Merkel joke or 4. My point on the religious side of things is: On day 1 she seemed like she was ready to fuck me, on day 2 she was an ultra-sweet, inonocent nice girl: is this just a game, or was it just my lack of sexual framing that was making her this way?
3: Not 2 minutes after I posted this, I headed out to my part time job on the way she texted me saying: "I had fun today blah blah blah, we should get together again." So for our next date I will have to work on making it more sexual, which admitedly is one of my weak points along with approaching. This will be a good opportunity to work on this, and I will give it my all.
Thanks for the Advice man.

1. again you can do it with something low pressure like: "i've got to go, but can i grab a glass of water first."
2. could be both. girls are moody creatures.. lol
3. gl hf in your next date

Glass of water- so simple, why didnt I think of that? I will give you an update to how day 3 goes. Thanks for the tips.