Freshers, please check out Diva's History
The Students Unions own bar, decorated something akin to a nightclub, with lots of lights and woefully few seats.
It even does boast It's own giant Amoeba on the wall!
Has a good selection of beers (though they are sometimes poorly kept) and is a pleasant place to chill out in the afternoon when you should be in lectures. There are DJs on several nights and live bands sometimes.
Officially you need a Union card to get in but this is only enforced on weekends.
Has a 1am license on weekends and they have applied for more nights.
Friday Nights in particular are good for a rowdy night out.