Everyone dresses like the ′70s and grooves to some slick tunes. Rent a ‘fro wig or two to play with! Those ghastly clothes are everywhere now—you can get them cheap at a local thrift shop. There are plenty of ′70s composite music CDs around—you could buy them for the party and then give them away as party favors at the end. (That way, you wouldn't embarrass yourself by keeping them!)

Serve ‘70s canapés like Cheez Whiz, peanut butter and jelly sandwiches, Good & Plenty—all the tacky stuff you can remember.