I was just commenting on a post in the Lounge that is similar to your inquiry. Many of us do have hours of operation, however one may be accommodating to an early morning rendezvous if it's pre booked. On a whim may annoy some Ladies if you're texting outside of their hours.
I have a couple gents who work early and they like to slide in for a soapy shower before heading to work. I'm fine with a 6am, if I know the night before.