Since I am in a college town I go about once every few weeks. However, when the school year starts I might go every week. I just turned 21 at the beginning of summer.
Yeh clubs are cracking down on it though, the government has been sending underage people into clubs and pubs here (Manchester) and if they get served or let in the club gets a hefty fine.
Many clubs ID pretty much everyone now due to this.
I used to work in pubs for quite a few years as the software company I worked for mainly dealt in Hotel software. However I don't personally go there. I rarely drink and if I do it's when I'm with friends/family.
I only go a couple times a month to the bar. i don't get drunk or anything, I just drink enough to relax while playing pool and stuff. It's actually kinda fun.