bars - Nice N Sleazys, Captains Rest, 13th Note, Blackfriars are all my favourites. If you want a really cheap bar (and it's still decent) then go to Driftwood at the Charing X part of Sauchiehall Street.
clubs - it really depends what night you're going and what kinda clubs you like. There's always a decent night in Glasgow though. what nights will you be through here?
other advice - definitely go to Ashton Lane in the west end, near Glasgow uni. It's a lovely place, full of nice bars and restaurants, and there's a brilliant wee cinema there too. I've taken many a lucky lady out on Ashton Lane haha, it's quality.
I would avoid the majority of Glasgow outwith the centre/west end. The east end especially is to be avoided, and I say that with the best will in the world because that's where I'm from! Especially avoid Parkhead, because that's where THEY are from, if ye get my drift
