Thanks for sharing your experiences, everyone!

I was never an introvert really. I was more of an extrovert. However, starting with the worst of my bipolar illness in my 30s, that changed off and on. Sometimes I was one way, other times the other, but during the last six or so years I was more often hiding in my room.

That's a good thing to know about the Medicare Part B and gym memberships, but I only ever went to gyms if my old friend pushed me. I don't have Part B, though. I opt out of that and the drug coverage since I'm covered under my hubby's insurance. I only have the hospitalization part of Medicare.