but the slowest time of the day is the hour they're spending with a guy they don't really care for.

... but then again, never thought that was something to be able to gauge to begin with.  Every provider is different in so many ways, it really just depends on the person.  The only thing I have always known to hold true- year after year- location after location is that rain makes for a more busy, fun hobby.  It not once was slow when rain came around.  I can only say that with all certainty because for my "friends" it makes it a heck of a lot easier to run a bit later for "dinner at home with the fam" when there is rain.  I mean come on- no one wants anyone to rush where there are slick roads and traffic delays!  
For me, the song "It's Raining Men" by The Weather Girls is right on point.
Hope everyone is well and hope everyone has a wonderful 4th!!

weekends would be the slowest. Quite the contrary, I always thought that's when most people would be free to hobby seeing that they would most likely be off from work on those days. But if your experience says otherwise then I appreciate the tip. Btw, I checked out your website, and I think you're totally hot. I'm deff gonna hit you up whenever I'm in Chicago.