As an individual, not that often. Collectively, a lot. Not counting the 2 outdoor amphitheatres, I can name 8 theatres in my area with capacity >1000. Severa

As an individual, not that often. Collectively, a lot. Not counting the 2 outdoor amphitheatres, I can name 8 theatres in my area with capacity >1000. Several more in the 800-999 range, and I'm not sure if these thresholds would apply to "audience in the house" or "total souls in the building". Seattle's gathering limit is much lower (250) than SF's, and includes "social distancing" and other limitations, which essentially shuts down all concerts, plays, musicals, conventions, and lectures. For example, I see the 5th Avenue Theatre here (capacity: 2100) just cancelled their entire run of a show that opens this Friday (8 performances/week for 3 weeks). That would have potentially been >50,000 people. I estimate bans like this will prevent the intermingling of at least several hundred thousand people each month, in each metropolitan area which enacts it. I'm no expert on the spread of disease but that seems pretty significant.