I suspect a lot of the things that have been listed could be done with a partner - dancing, and exercise being obvious ones.

I recently started taking up pottery. My results are mostly terrible, but it is still fun. As a result of covid the local school closed their workshop, but the teacher arranged for us to be able to collect hunks of clay, and she'd fire it when we returned it a week or two later.

My wife is amused at my work, but kinda pleased I've got a fun hobby, so she joined in. We built a few things on our dining table, and when she got her fired pieces back she was pretty pleased with the process.