Not much in the way of clubs, The Venue is awful. Then there's The Works (not really to London club standards) and The Chill (never been but looks more like a bar). Pubs are everywhere and great, hit up the Penny Theatre on a thursday, packed, but cheap-o.
Clubbing wise though, Kaos at K-Bar is quite good on a saturday, saw Jaguar Skills there and he was immense. If you're into indie, most people go to Ruby Tuesday at Origins but I don't really appreciate indie clubs although it's mostly what I listen to. Mungo's on a friday is quite good as well. Bare in mind these are just campus bars that have clubs nights happening, it's small but they are decent nights out if you're with the right people. It's not exactly going to be Fabric on a friday but that's what I like about Canterbury, it's nice and quiet. People have halls/flat parties as well which can be fun.
Shopping is okay I guess. Canterbury city centre has all your main high street clothes shops. No Primark though, to pretty much everyone I knows annoyance haha.