I entirely agree. I forgot to mention, I work remotely. My closest coworker is 300 miles away, and most of them are in Quebec! I'm trying out a co-working space this week, but I'm out of town one week every month, so it makes it hard for me to be a "regular" anywhere.
I've also joined a crafting meetup (the knitters don't mind me chip carving at their knitting table), a German language class, and am trying out gyms that have group classes. There's a point where the alone-ness is more wearing than the effort of going out and meeting people multiple times a week.
I am slowly getting back into running. Once I can do 3+ miles, I'll think about doing a club.