Well, the first thing I did when I retired was sort my button box. I guess I needed something easy and mind numbing to recover from my stress filled job. Then over the first year I 'tried out' many different groups, without committing myself to anything. Now, 5 years later, I have a nice balance of things I do. I have two weekly commitments that I try very hard not to miss - too much fun. I also have a few once a month commitments. This seems to be a nice balance for me of social time, solitary time, time with family, etc.
I think it really helped me to try things out that first year, without making any long term commitments to any group, so that I could leave the group gracefully.