There are loads of bars to choose from and two nightclubs in Icmeler. They are fairly low key though are open till early hours of the morning. Play some good music, dance stuff though drinks are quite expensive inside the clubs. If you want a more full on clubbing night then
Marmaris is the place to do, particularly 'bar street'. This is lined with bars and clubs. The clubs are not quite like the ones at home (they do have open air) which some have light shows and stuff like that. Most have dancers and one of them, I think its Back Street Bar has a foam party most nights. Either way, you'll find something to keep you occupied I'm sure.