I just don't think there's all that much transmission just from surface contact. when they say viruses last on surfaces for X hours, they're saying they can detect them with electron microscopes, not that there is enough to actually infect you.
Would I go to a studio that was one small airless room where there are people pipelined in there nonstop for hours? Probably in that situation I'd want to be the first appt of the day to feel safe. But a place where it's fairly roomy, they are meticulous about cleaning, and rooms are empty for a while between appointments? I think I'd feel okay about it with masks for client and provider.
If it were THAT easy to get it, we'd mostly have all had it already from the supermarket.