they made a stipulation about "outdoors" where they are requiring masks for events of 1000 or more where you are "standing", pretty much cheek to cheek and jowl to jowl next to each other - e.g., a concert (the Health Director also gave the example of a "mosh pit" ) or like if you have hundreds standing along a barrier to a stage, with rows of people that can number in the thousands going back deep as you move further away from the front.

This was distinguished from people who were to be "seated" in outdoor stadiums who could go maskless if vaccinated (although going to any inside portion of the stadium to get food or go to the bathroom required a mask). The difference supposedly being that when seated, there is a bit of distance between seats so people aren't generally smashed together.

This past April when Citizen's Bank Park (Phillies) was 50% capacity, "socially distanced", it looked like this -



They are now at 100% capacity but even with that, there is still a bit of a gap between people and rows.

This is in constrast to the "Made in America" Labor Day weekend concert that they have here every year (last year's was cancelled but they are going ahead with it this year - masks required for the outdoors stages and proof of vaccination as well). This was from 2019 as an example -



So for analogies - when you have State Fairs, you have people crowded together, standing around exhibits or food stalls or moving in a large crush of bodies through relatively narrow "aisles" or pathways.

But at sports events, although people might be getting up and down out of a seat, you don't have the type of density just due to the seating arrangements. The exception would be the "standing room only" areas that I think many stadiums may have.