I wouldn't be going to any large event right now. This Omicron variant is so transmissable. Girlfriend and I and her 2 adult children that live with her all got it just before Christmas. I wasn't able to get an appointment to get tested, but GF was tested (PCR) on Dec 22, and got positive result on Christmas Day. We're all fully vaccinated. Pretty mild symptoms for me (sore throat for 2 days, head cold for 4 days) and the "kids". GF had it worse - she tends to get bronchitis easily whenever she has a chest cold. Lost her voice for a few days, but she's okay now. Her daughter tested positive the next week (near impossible to get tests these days), so safe to assume that we all were infected. We were always careful in public - masks, distancing, etc. They're saying now anyone who has cold-like symptoms, just assume you have Omicron.
Anyway, go Bruins!