This hasn't happened for me in the last 35 years, but if I am, say, on vacation? I like to read books, exercise, eat at restaurants.
If you are feeling isolated, it's really good to go get coffee at the same place everyday. We tend to discount the value of weak social connections, but they are the glue that holds humanity together.
I miss the non-porn nudes threads, Normalnudes and NakedProgress, the ones with an "if you can't say something nice, don't say anything" policy where people of all body types could show their shape and/or their fitness progress.