No. I'm in my mid-twenties, and cannot see myself living without a roommate or shacking up with a significant other. I like my privacy (that's what bedrooms are for), but I also like being around other people and having my expenses cut in half (or thirds). Growing up an only biological child and not living on campus as a collegiate, I CRAVE living with people my age.
When I was active in my young adults group in church, it wasn't uncommon for the single ones in their late 20's and early 30's to become roommates.