Columbus State has plenty of "older" folks. In almost every class i have taken there are 30-50 year old students so don't feel stupid for returning. However, i did NOT see this at Ohio State. Like Jewtoys basically said, it depends on the school. Big schools have alot of students from rich parents that send them off right out of high school. Smaller school are for the less fortunate but for folks who still want to make something of themselves.
One thing i would keep in mind is that curriculum is constantly changing, so any classes you have taken in the past will probably be of no real value towards a degree. Hell, i have been going part time for the last 4 years (2 year school might i add) and the classes have changed just during that short period.
Another thing to consider... If you're going to get some sort of aid, I recommend going full time and here's why: If you don't go full time, it takes forever. During that extended time the interest on the loans adds up big time. Ill be at nearly 25k for a fucking associates because i go part time. If you're only going to go part time really try to pay out of pocket. It will save you endless amounts of interest in the long run.
None of this is relevant if you want to be an attorney. Going to need to go bigger. Much bigger.