With all the reviews here, and the amount of complaining about broken appointments and having to wait their turn, etc, factor in all the guys that go but don't post reviews and/or don't even know about this site, I'd guess the number is closer to 10-14 a day
I'm talking about if it becomes a fast house. Those girls would be getting tun through 20 times a day. People are concerned out the neighbors next door? What do you think it will be like if guys are popping in and out every 20 minutes. It will be a total shit show.
Realistically, these girls see about 7 or 8 customers a day on average. Maybe a couple days a week they might see a few more. Then you have your exceptions like Anya or Seven that were booked all day long.
If enough people bitch and moan about waiting a few minutes to a half hour, maybe the solution is the HAGNJ approach. No walk ins, scheduled appointments only, increase the price and make it one set price, and start screening guests. What they lose in volume, they will make up with the price increase, and it will end up being a better experience for everyone.