Would you recommend PetSave Foundation?
I had volunteered at this is shelter only twice but my experience there was great. Ms. Willow, the lady in charge, was very friendly as well as the other people who helped there. When I went on a Wednesday, I was the only non-adult volunteer there along with around 2-4 other adults. It seems that there is never enough help so there is no need to worry about being put on a waiting list. And the great this is that there is no age limit so anyone could help out- with adult supervision of course.
The bunnies were adorable and it was really fun to help out and clean around the place.