Menu ideas for a party of 20?

[brit]

DH has invited all of the associates at his firm, and their spouses, over for dinner/drinks on December 1st. It'll be 22 people, including us. Obviously, it's too many people for a sit down dinner, but it definitely needs to be something substantial. Suggestions?? Thanks!

[jennistarr1]

Fancy slider sandwiches like crabcakes, sliced beef with horseradish, pork with a chutney along with a nice salad, maybe small things of soup, steamed shrimp, veggies/dip, cheese platter