As much as I and many others dislike face coverings, the data just keeps on showing that they work, esp when coupled with other common sense mitigation measures. Previously we had the hamster study suggesting substantially less risk of transmission when wearing a mask and when transmission did occur, the disease was less severe.
Now we have a conclusion to the infected Missouri hair stylists who exposed over 100 clients to coronavirus back in May because they worked while symptomatic(though they did only have mild symptoms)
"Two Missouri hair stylists who saw dozens of clients while infected with the coronavirus did not pass the illness to any of their customers who were tested, health officials said.
The health department also said Monday that in addition to required masks, the Great Clips had other policies like the distancing of chairs and staggered appointments that likely prevented the spread of the disease."
So, it sounds like haircuts are probably safe if everyone is wearing a mask, properly distanced etc...