Best tips to not over indulge at Super Bowl Party?

My husband has advised me that we will be heading out to a Sup Bowl party tonight. I have been on a trict eating plan this week and as soon as he told me that I was scared. I have a big issue around food and find it VERY HARD not to have awsome food and munchies when I am round them. Does anyone have any tips that can take this fear away and alo not hrow a week of hard work down the drain in one night?