I'd also say don't play any slowies, but no harm in taking a couple of the higher profile tunes in case you're asked for some.
Play any funky house/dance from the last 3 years or so - Fedde Le Grand, Mason etc, also a good spread of urban material - Rihanna and so-on; Some of the better indie offerings would possibly go down well with the lads.
Don't forget to take along your oldies, as you are likely to get asked for such stuff as Village People, Cindi Lauper & Guns & Roses. (These people get to hear their parents' music as well, you see!)
Once you have a decent backbone of music prepared, you may well find that requests help you steer the night.
Don't be disheartened if not too many do any actual dancing - they are most likely to stand around in groups jigging about a bit, with maybe only a handful of girls doing any real dancing.
Good luck - have fun!