When is the busiest time for a provider? Days or nights? Early eves or late eves?  Weekends or weekdays?

From my brief survey, I think weekday afternoons are the busiest. It seems typical that a guy has a SO, and can't get away for evenings/weekends.

Convention times might be different. Out-of-town visitors will probably have a lot of evening time to spend.

then again after 9. Not getting much help except from you, tokai. Thanks.

In my experience it is weekday afternoons.  In my experience the business is very M-F, at least in my part of the country.  I have had weekends in which I wasn't able to get ahold of any providers.