From an SP perspective to add to this btw: most incall booking requests tend to be Monday-Wednesday daytime office hours in general lol, those are the most popular days and fewer late night bookings.
Late evening bookings there is greater demand for outcalls. And late night bookings (past midnight) the girls who tend to work those are generally up for partying and drugs in my experience. A bit of a generalisation I know… but overall that’s my experience.
This is not within GEA at all so could be completely different
But just saying most busy booking times are definitely weekday office hours. For me anyway 
I’ve had many late night bookings with these so called party girls(mainly Romanians) and the reason why they work so late is because not many escorts work past midnight, therefore there is a gap in the market and the drunk punters from the late pub/club scene come in shedloads. It’s not even about escorts liking to party or take drugs, but for them it’s easy money, of course it comes at a risk when the punter is too drunk and abusive/offensive/boundary pusher etc. but usually they pay good money and stay for hours.
Now when it comes to drugs, I’ve asked girls if they actually part take in taking drugs/alcohol and their most common response is yes but it comes with a caveat, they only agree, if the punter stays longer than 2 hours with them. Otherwise the answer is: no.
One girl told me she would only participate in white party, if the client stays overnight.