Dinner/Cooking Question (inside for details).

Okay, I’m sorry if this isn’t the right place to be asking this (I have the feeling that it isn’t), but I know that I can get at least a few helpful responses on here (because all of us that use Fluther rock, duh!), but tomorrow I’m having a dinner with a few of my close friends, and each of us are preparing our own dish. We have BBQ Chicken, green beans, biscuits, and for dessert a dish (apparently the person in charge of this part is undecided as of now too) with peanut butter involved. However… I have no idea what I could add to this meal! I was thinking something along the lines of potatoes (garlic mashed, maybe?), but for all you food lovers, it would be amazingly awesome if you could lend a suggestion or two! Thank you!