Just spent a week in Venice Beach.... This area of Los Angeles should serve as the model for what society should look like. Simply eyeballing it, it seemed about 80% of the people (during the week) are in incredibly good shape, at all ages. The stereotype is that Venice Beach is all extreme muscleheads, but they were really a minority (I don't have anything against those types). I simply saw toned, in shape bodies.  There is public workout outdoor equipment in both Venice and Santa Monica. People were running, playing volleyball, surfing. Everything was fitness oriented. I even saw homeless people working out and in great shape.  The outdoor gyms are an incredibly good civic investment. Every city should think about putting them in. I've been to Boise, Idaho once and they have a couple (doesn't hurt Bodybuilding.com is based there and they paid for them.) Theirs were all-weather, year round and being heavily used.  I probably only saw 5 walruses on the beach, max.   It was refreshing.