What volunteer opportunities for retired seniors?

[mh10]

I'm a 62-year-old retired guy, living just south of downtown Tulsa, and I'm looking for some volunteer activities, perhaps in hospitals or schools, or anywhere.

Any suggestions of places I should contact? In my case, transportation and personal mobility are a bit of a problem, so I need something not too far from the downtpwn/midtown area, and I would need something that would not require a lot of walking or standing.

Thanks for any suggestions.