Registries are for everyone! Even if you're older than the average bride and already own household essentials like bath towels and cookware doesn't mean you can't open a registry. You can always upgrade your toaster oven to the newest model, or register for gifts like sterling silverware.
If your idea of a party is having friends over for pizza and beer, you shouldn't necessarily shy away from registering for gifts like china or crystal just because you don't think you'll use them. You're more likely to use these items when you're older when you entertain family and friends. Believe me, you'll be thankful later in life that wedding guests purchased these entertaining staples for you to use at special occasions.