Before I got into games, I would go through bakerstreet and attempt to create a sort of ongoing CR thing with a few characters. It worked about one third of the time, I think. Many people tend to drop, which can be frustrating... but you'll find that one nugget of gold among the grains of sand. All I can suggest is that if you do find someone who seems to tag on the regular, try to contact them via PM and ask if they want to keep it rolling. It's nice to make a connection!