R.K.
I agree that most people don't like games, but here are a few that I have used.
1) Get a plastic baby bottle and fill with jelly beans (pink, yellow, or blue). Set it at sign in table. When guest arrive have them write on a piece of paper how many jelly beans are in the bottle. Make sure they put their name on paper. Closest one to correct number wins a small prize.
2) Baby shower bingo. I found some Bingo cards at Hobby Lobby with baby shower gift items. As the mom-to-be opens a onesie (for example) the person with onesie on their card, marks it off. You can play until all spaces are marked off if you don't want to give a ton of prizes.
Good luck.