I've played a handful of pickup games and only one person has worn one. Thankfully it's a mature group of guys and many are wearing masks around the rink and in the locker rooms and there's no stigma. I bought a UA Sports Mask to try out this Thursday though. While it's not remotely as effective as everyone wearing one, at least I am decreasing the chances of giving it to someone else if I were infected and asymptomatic.