Party of 15: Appetizers

OK, Serious Eaters... I'm going to a party and I want to take some easy appetizers. Must be ok for an audience of ages 10-70. Peanut allergies abound and there's probably limited oven space.

The only other wrinkle is there are a lot of fish haters in the audience (I know... horrifying) so steer clear of that. Anybody have some excellent ideas?