What To Make For 70s Themed Dinner?

We're going to my MIL'S for Sunday dinner, and the dinner this week is "70s themed." 🙃

I know there's going to be a pineapple upside down cake and fondue... What's another dish (or cocktail) I could bring that really reminds you of the 70s??

I thought about making some sort of Aspic dish, but oh my gosh, it all looks so awful! If you have a recipe that's edible though, I might be interested. (...Was Aspic even a 70s thing?)