In response to Clairdelune, what recreation? Shopping? Going to school? Getting drunk? Eating? These are not recreations. Not everyone in bedroom communities lives near a park, movie theater, or etc. And, most everything recreational in public for adults in these cities is the opposite of social: sitting in a dark theater? Fishing? Golfing? Being drunk (maybe they socialize, but it's not worth joining them in)? Eating (this is part of the obesity cause - eating as recreation)?
If you want something fun to do as an adult (thinking you're having fun when not due to cheap tricks of drugs does not count), there's a good chance you will have to commute to a healthy city to find it, or to leave cities altogether. If you don't have a car in these cities, you're trapped.
In general, as a kid, you enjoy these cities. Then, you grow up. Suddenly, you have nothing in common with your neighbors besides location. There's nowhere healthy to meet other single adults, not much to do that's fun and healthy outside your home, few available jobs to start you off into working life, despite that's required to get jobs in the city-hub your commuter town's populace largely works in.
Frankly, this is in itself why people are glued to the internet and why even non-gamers are playing massively multiplayer online role-playing games (MMORPGs). Because too many of us in the U.S. are trapped in these poorly designed towns and cities that can't meet our needs.