What’s the best hotel in dc for a daytime outcall?

For many of the chain brands, elite status allows for early check in and/or late check out (usually easier from my experiences) so I usually just get a room for evening prior and check in on way home from work and then request late check out of 4p and that accommodates any mid day outcall needs I've had.  

Some hotels have day rates.  I have visited providers who have taken advantage of them!

http://www.dayuse.com/

Viceroy and Zena have dayuse all day and evening

Try Dayuse. Once you get the hang of it, it works perfectly.

There is a major brand 4 star near Metro Center that is available most (but not all) days on dayuse. And it will let you pay in cash.