Cheap drinks, you can get stamps to get into AberBars/PierPressure free before a certain time.
They also do kareoke nights which I've been informed are "a right larf!" hmmm.. yes.
good place to get some cheap grub (buy one get one for a pound on pizza) and cheap drinks during happy hour.
It is now also open until 4AM, serving pizza until this time too. It also plays chillout music when it gets this late.