Also, don't let the temperature fool you, the sun is very potent and wear lots of sunscreen if you don't want to get burned. Very available if over 21. Lots of it. If you go to clubs, it is very expensive to buy any sort of drink. Don't be surprised if someone offers you drugs, as Ecstasy is very popular there among the college crowd.
Beer is out, mixed and frozen drinks are in.
In general, it is not very fratty at all. The clubs and bars are very trendy and there is a wide variety of people. It's a much trendier attitude towards dressing, and basically anything goes. It is an opportunity to wear those things you never thought you could back at school. Even with a car, parking is expensive and hard to find.