Personally I have found that incalls are more geared toward shorter engagments (2 hours or less). Overnights and such are almost always going to be on an outcall basis.
If your ladies cater to shorter trysts, then I imagine daytimes during the week are going to be busiest. The phones will really pick up late at night again, but I imagine that your ladies are selective enough not to entertain the party crowd....and late night/loud guests are a sure fire way to have your neighbours complaining.
If you are going to utilize a place for more than one lady, it is imperative that you maintain as much discretion, and as little noticiable traffic as possible. Operating during regular working hours will minimize the chance that neighbours will complain.
Best wishes!
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