I like to meet my dates late in the evening, 11pm or so. But I tend to keep my lady friends well into the morning, sorry....lol....You're not laughing, are you? C'mon man
But back to your initial question. Yes 2am is late in my opinion. When a lady is on a date, one thing might lead to another and the next thing you know, you're canceled on. Try 12am if you can. Do you really need the club scene? Skip it for one night.

I totally get where you are coming from. As providers, we are also in the same boat as you. Often times late night after club appointments turn into no shows(drunk, fell asleep, found a casino girl etc). Which is a complete bummer when we get all showered, shaved and cute at 2 am lol. Best bet is to find someone who will take a deposit but is also very reputable so you don’t get screwed over either. That way both feel confident about not getting canceled on. There are a lot of flakes in this industry so when you find someone you can trust run with it!

Im your girl.

Is at 1 AM daily and we will not no show you.

And by prebook I don’t mean the day of or a couple hours before. Offering double is meaningless if the provider gets stood up which probably happens more often at that hour. Instead try prebooking before your trip, then follow up a few hours ahead to let her know you’re still serious. Communication is key. Providing verifiable references will cut down on cancellations as well, anything you can do to show that you won’t flake can go a long way. You might also try to schedule an earlier hour and just leave the club earlier. Vegas is already about the odds so might as well do everything you can to improve them.

summary  
1) don't give deposit  
2) pre book!  
3) stay in touch  
4) day of meeting - text during evening so she knows you are still on  
5) did i mention dont give deposit ?   LOL  
6) show up sober!  if you are drunk many will turn around leave or worse .. come in.. get you drunker and empty your wallet as you lay there passed out.  
7) if you handle this professionally and with respect you won't have to pay 2X either .. most top girls appreciate more someone who stays in touch and shows up on time clean and sober.  

Hmmm...I have been doing late night appts for years

and have never ncns or cancelled.  
I am usually available if booked in advance up to 3am sometimes later depending on the situation.
Perhaps you are booking ladies who do not normally keep those kind of appt hours so when 2am comes they are too tired or cancel.
Not sure what the issue is but there are some of us who are up late night and will accept appts.
Good luck to you.
Just my .02