Yes, I assume I will either volunteer or work part time to fill my days. I believe the company I work for allows for a transition to part time, so maybe I won't fully retire and keep my health benefits. I still have about 20 years, so I feel like anything could happen in that time - social security could be dismantled for good by then.
This is one of the reasons I have investments outside of my 401k. I do not want to be dependent on "retirement funds" when I get to that point.
Thank you for reading and commenting! Great question!