Roommates are extremely common among young people, even when they aren't strictly financially necessary. Pretty much everyone I know has lived with a roommate a

Roommates are extremely common among young people, even when they aren't strictly financially necessary. Pretty much everyone I know has lived with a roommate at one time. They are uncommon after around age 30 unless financially necessary. If you're older than 30 or married you probably won't be interested in a roommate simply to save money unless you already know the person well or you have a mother in-law apartment set-up.