Just 2 weeks ago, a group of random siblings decided to host a nice dinner "party" for someone dear to us but we had no idea what to bring. It's not really a matter of what to bring, depending on the cuisine, but more about convenience and fool-proof ideas.
I doubt anybody would want to slave over a hot grill whilst the crowd is having a ball in their own world! Definitely not. You want something snappy but yet impressive and tasty:)