I just went to a wrestling event, yes the Hulkamania kind, and it was a safe environment with everyone being respectful. I can assume what I experienced should be how most arenas handle things. Spaced out at 10% capacity, temp check on the way in, and masks required. Nobody fought over masks, nobody moved seats and nobody gave you a hard time about taking the mask down to eat and drink. If you weren't eating or drinking but had your mask off for an extended time, security would politely ask you to put it back on. Bathrooms had attendants to maintain space in the restrooms and concessions were contactless. In my opinion there's no reason we can't attend outdoor venues if precautions are taken.