I'd have to disagree with the above statement.. don't invite her directly to the pub crawl. You want one more date/something in there so you can f-close at the pub crawl.
You should definitely invite her to the pub crawl, but do it AT the coffee date. Cancel the aperitivo , the dinner is too formal/date-esq. You can't downgrade to a pub crawl from there.
I would say, find out when her last exam (most likely Friday) is, and get a coffee (or something fast) with her right afterwards, and then invite her to the pub crawl (hopefully its Saturday).
If the pub crawl is friday, then you have no choice but to invite her via text, in which case you should use one of the below openers. The thing is, though, she'll be tired from all the exams/the hectic week and you are very likely to get rejected for any late friday night ...
"OMG!!! You'll never guess what just happened!?" -- Follow with a SHORT story that can end with you implying it reminder you of her, and inquire about the coffee date.
(best for a couple days later, like thursday) "Okay, I texted you. What are your next two wishes?

"
"Made you look

..how goes the studying? Coffee break?

"
"!! Have you seen the news!?" her: "No, what happened?" "Aliens are abducting all the sexy people, and I just wanted to say bye..." Easy to follow up with a "we should see each other one last time" or something, keep a joking tone.