This happens to me sometimes! A couple of good ideas for next time:
1. Restrict the drinking ( 1 an hour ) or none at all and keep to water
2. Try to only eat the "healthiest" thing there. Jelly? Hi fibre?
3. Be prepared with some diet supressant pills and fat absorbing pills. I take fat blaster, and fat blaster magnet (4 pills). It reduces hunger (so will filling up on water) and absorbs a lot of fat that you may eat.
Don't sacrifice your social life for your diet, but don't make your social life food!
