I don't know if she was given the chance to pay for that too. I know for the entertainment industry (and sports) they have requirements to stay in pods (ie. maybe the multiple different tents they setup are to keep bubbles intact), and they have to do regular testing within the bubbles to isolate any positive cases if they occur. This also means they have to hire people to administer the testing - another overhead cost.
In theory, if she has invested in the necessary precautions and is willing to do contact tracing and follow mask/distancing guidelines then there should be some accommodation, although the risk is naturally higher because her tables are more likely to have people who are not in bubbles, and come together from disparate groups without masks versus a work team who is together on shifts and gets tested regularly. Problem is you get a few idiots like this Adamson's guy who spoils it for all the other business owners who are trying to comply with guidelines.