Hi guys, some of you may see what's happening, because I am not.
Let me tell you about several situations where I can't find what I am doing wrong:

- I met a girl online, we date in a nightclub. Nice talk, dancing, kiss-close during dancing. Then we sit and keep talking about an hour. It's late, she has to leave so I leave too.
During next week I keep talking to her and try to get a second date but she always give excuses. I finally gave up on her after 3 or 4 weeks.

- I met a girl and date her, no kiss-close (I thought I lost it). I invited her to my place next weekend, we get drunk, we had sex. Next weekend I try to get a second date and she says ok, but she says she has mixed feelings because of previous relationships, so there will be no sex (WTF?). I said ok, but then she put some excuses. I gave up with her pretty quickly after the "no sex" comment. I was confident that the sex was good, and she enjoyed it.

- I met a foreign girl who was in a trip organized by an institution. She agree to come to my place but then we realize she has to go back to the hostel because of the institution policy (it was true, I was there when she was informed about it). I go with her, kiss-close in the hostel. There was no possibility of sex there, so I asked her to text me when she knows she has free time again so we could hang out. I know she would have more free time next days.
She said OK but seems like non-interested, and did not text me again.

- Dance club. Girl alone with two friends (a couple). I asked her to dance, we dance, we talk, and spend 2 hours with really good vibe. After that, kiss-close, we dance again in a more sexual way while kissing. Everything seems good. Then their friends (the couple) told her they are leaving and she tells them that she is leaving too. She was saying goodbye so I asked her number, but she told me her cellphone is not working (true, she was without cellphone there). I asked her facebook and she told me her name, which was of those common names with 1 millon users (impossible to find in facebook). I told her I would not be able to find it and it seems to me that she knew it and did it on purpose. I told her to give me her email so I looked for her in facebook.
She gave me a fake email (I discovered later when I looked for her and found that the email was from a different facebook user).

In order to give you a little more information about my profile and my "game" experience.
I am trying to improve my game (after being in a long relationship). I am 27 years old and had like 8 dates in the last 2 years, where these four dates described were the "best".

Any suggestion is welcome.
Thanks!

IMO the fourth one is irrelevant to the overall issue because it was a situation where you met a girl while out at the dance club and the interactions with her did not go beyond that.

As to the first three, in my view it's too small of a sample size to infer that not getting a second date will be a sticking point on an ongoing basis.

In fact with the second girl in the list, it looks like you had her over for a second 'date' and had sex with her at that time. So the issue with her was the inability to secure a third meeting.

I don't think you are necessarily doing anything wrong and I would credit the first three to the randomness of the game. In the casual dating world these things will happen.

Meet more women and you will find the ones that are more compatible with you and with what you want and you will find ones who are down with meeting up w/ you on more than 2 or 3 occasions.