THere was one shower I went to with games that weren't COMPLETELY stupid, a little cheesy, but fun. You know how when people get fortune cookies they always say "in bed" at the end? well this game would go perfect with your theme. They had a box/bag of fortune cookies and each guest had to get one. THey had to read the fortune to the bride to be and say "in bed with Jeff" at the end. It was pretty hillarious. Her mom had to read one that said something crazy like, "you will end up in an exciting new position" and then she had to say "in bed with Jeff" we laughed for soooo long, her mother was mortified.
One that I did for my little was kinda silly but puts them on the spot and can be hillarious. Call her fiance and ask him a bunch of questions, like what was his first dog/car/etc, where did he graduate from high school, what is his favorite color, food, restruant, etc, where was their first date, etc. Then at the shower you ask the bride to be the same questiosn about her fiance and see if they match up. It's kinda funny but can be bad if she realizes she doesn't know him that well!