When the lockdown ends. A lot of punters are still not going to want to book until a vaccine is developed. And those who do want to book, are going to be skint due to being furloughed for months.
So unless a load of WGs retire from this job. There are going to be a whole load of girls trying to entice a small selection of punters to see them. Who those punters will still be incredibly cagey about seeing them too due to potentially catching this from them. And those WGs will also be cagey about guys seeing them also due to potentially catching it from those guys. So everyone will be cagey about each other.
The only possible way for WGs to, therefore, entice cagey punters is to drop prices and offer deals. However, if they drop prices, they are putting themselves at huge increase risk of seeing someone with the disease and catching it themselves simply due to footfall.
I really do therefore suspect what the sensible WGs will do is realize the longer bookings are the best safety to money earning potential and offer incredibly cheap longer bookings. I say this as if they just do the rinse repeat 30mins ones, they are going to spend so much time cleaning and the panic of will guy number 3 have it, or guy number 6 have it in a days work. So they will want to see as little punters as possible but still want to bring in some money. They will also want to discourage shorter bookings so will likely up those prices.
So I really do think what may happen is, the shorter booking time prices will go up. But you will be able to pay £300 for an overnighter. To make one guy give them enough money for a days work and make it much less likely they will catch something as all they've seen to get that money is, one guy.
Personally speaking, I really hope that happens too.
*Edit* And thinking further, if they did the longer overnighters, and all they seen was one guy in a shift, all they'd need to do is bring a digital thermometer with them to check the punter out at the start of the booking to make sure he is not displaying symptoms.