You got lots of good suggestions. My favorite thing is waking up hangover and regret free. That is my kind of fun these days.
Some other stuff I enjoy sober…
Reading, bicycling, mtn biking, checking out local hiking trails, chasing waterfalls, running, visiting pop up shops, hanging at the beach, going to the sweet old style movie theater in town, drive in movie (if you are lucky enough to have one nearby), camping, baking, gardening, did I mention reading?, game nights (yahtzee, cribbage), browsing antique stores, trivia night, meet ups with friends for walks, checking out a new town, just chilling, bowling, pool volleyball with the grandson, puzzles, knitting, saving for a vacation trip.
Also…more here…