How about this: Starting about 2 weeks before attending one of these events, you start taking about 500 mg of quercetin along with 50 mg of zinc as chelated or gluconate? Along with about 5,000 units vitamin D per day. Then, go to your event and enjoy it to the full--no wearing masks, no nothing. Continue these supplements for about 2 weeks after the event--they are safe in these doses to continue indefinitely, and your health will probably be that much better for it.
Then, if you do manage to get the virus (less likely if everyone in the group is taking these supplements, since they shorten the course of the "disease"), you will be more likely to either get no symptoms or a mild case (the Donald Trump edition, which means you are sick for a couple of days with a cold followed by abruptly getting better). This will leave you immune to the disease in the future, and after all isn't that what a vaccine is supposed to be about? I would rather take these supplements and then just go to where coronavirus is being spread as my "vaccine" instead of taking a DNA ruining shot.