Need some suggestions...

So I'm having a House Party Game Night http://www.houseparty.com in a couple of weeks. I need ideas for what kind of food to servce. We're expecting about 20-25 people (half adults, half kids). I had thought about just doing appetizers but then I realized that the party is going to start at 6pm. That's dinner time for most families so I need to have something more substantial than just chips and dip without having a sit down dinner for 20 some people. So if you have a tried and true recipe or even just an awesome idea leave it in the comments. Thanks!