I went to the NY one when they came here, since I already live here.
It's free I believe.
As a student, you're allowed to access most of the non high-tier and unpaid conferences, which are definately enough to keep you more than busy for as long as you like. The website has a .pdf of the schedule. Simply find what lectures you'd like to attend, and go. Many of the lectures at night are at hotels that provide dinner and sometimes drinks. They're sponsored by drug companies in these cases.
Be sure to visit psychiatric Mordor. It's fun and you score lots of free stuff.