Jmo but I’m glad they will require masks. But I will admit I took mine off while playing... not the smartest thing and I regret doing that.
I wear a disposable surgical mask which was comfortable fwiw. I have an N95 and KN95 but I think those would be more difficult to get used to.
Also fwiw, the mask that Cosmo provided to guests seemed hardly worth it to wear: it appears to be a nylon tricot that seemed pretty flimsy.