I am a twentysomething person with friends who are always working when I have time off, work weird hours, and I do find myself watching a lot of TV. It's easy, doesn't require a lot of planning, and gives me endless hours of entertainment. I deal with needy people all day, and I don't want to have to argue or negotiate with people when it comes to deciding activities. I don't have to explain why I think paying $10 cover for going to the club is stupid, or why I cringe when I have to drive 20 miles to attend an event, or why I am upset that I can't get my monthly gas and water bill to get below $50...
That being said, I also watch it for free on Hulu and don't pay for cable. I know there are other ways I could be spending my time that might be more productive, but I do find it to be cheaper and easier than hanging out with some of my friends and acquaintances.