Most shops open at 10am and some shops don't put up their rosters until then. If we want to be there 10am or 11am with travelling time we don't have the time to consider those shops. Or we take a risk to start to travel there and get in touch with them half way in the journey hoping that the girl we want to visit don't get booked.
I stop doing the 10am punt as some of the girls don't come until 10 minutes or later. They need travelling time to get there. And doing their hair, make up or having shower after arriving. There isn't much advantage to be the first customer.
I prefer they post their rosters in the late afternoon a day before. I think a few shops do that. It gives us the time to browse around and pick the right girls.