There is a big misunderstanding around how the virus spreads. The biggest likely cause of spreading is via contacting surfaces with your hands. It works something like > infected person coughs / sneezes into hand > hand touches surface > uninfected person touches surface with hand then transfers to their face. Actually breathing it in is likely pretty rare. This is why washing your hands is the N1 thing and far more important than wearing a mask. And the Mask doesn't stop you breathing it in, it stops the infected person breathing it out (breathing alone is also low risk, coughing and sneezing produces the kind of liquid droplets it needs).
So pubs with all the surfaces and the enclosed space are very high risk, a football ground is pretty low risk as you don't touch that many surfaces.