It is a bummer, but when it happens to me, I just sigh and think about all the money I saved.
if you do get a no show, and you figure it was meant to be, as she got sick, or had to go out of town suddenly, or a family emergency. I can handle that. What is annoying is that after an excuse, you decide to head to a strip casino for some gambling, and there she is at the craps table with a "high-roller" having a good time. This is what happened the day I was told about TER, and my buddy was pissed that she stood him up. Yep, good things have happened to me in Vegas. At that point we made out way to the strip clubs, on him.
Kim and Angel: thank-you for the advice, I will look into the verification services. Vegas would have been my first independent experience as in LA, I've been using agencies. Hoped to build my referral up, guess not! 
ILOVEWOMEN: Yeah, I wouldn't tell them about "Plan B" either. But you are right, I'm sure there are many choices in Vegas and if they don't care about us, why are we so worried? Glad your Plan B worked out ~ life is strange sometimes, what is meant to be, was meant to be.
velalover: That's the risk I thought about it, I don't want to be on some DNS list!
PS: I have received several PMs about names regarding the NS ladies. Again, no names, since it was NS only and Lady B did at least find someone to cover for her. However, I don't mind looking out for fellow hobbyists (that's what TER is for) and if you have a trip planned soon, you can give me the names of your ladies and I'll tell you whether it's them or not. I don't want you to avoid them completely, they are well reviewed and yup, shiet does happen. 
Cheers!
Think of the money you've saved AND call ZACK in advance and get pre approved next time before your trip. I've never had the opportunity to use his services but I got pre approved last year so I know if I ever get jammed up I can make that late night call.
Ok, this is possibly going to cause a bit of a fire, but what the hell. After reading your post, and assuming that everything is true, I think it might be wrong to NOT let people know about who it was. This IS a business for these ladies. If I had an appointment that was made, in advance, AND confirmed day of, within a couple of hours of the scheduled time, then I would fully expect to keep that appointment. I fully understand emergencies, and those sort of things, but the first ones excuse of a birthday party is LAME. She obviously knew of the birthday, its not like a birthday comes up last minute!! Second lady obviously got a last minute appointment for an out of town date, which will of course pay more than what you were probably going to be doing, but, and I am talking business here, that ISN'T good business, REGARDLESS of the amount of money she is going to make. There was a set date, which had been confirmed by BOTH parties. Now, if anyone conducted regular business that way, then they wouldn't be in business very long.
I have always shown great respect for the ladies here. I know there are a few bad apples in every bunch. But this should not have happened. ESPECIALLY two days in a row. And ESPECIALLY in Vegas.
Again, this is all assuming that this is the truth. There are always two sides to a story. But still, I think, in this case, you should let people know.
Ok, I await the responses that this might generate.
Amen Brother!! Its good to see another hobbyist become jaded finally. lmfao
For that, I have removed you from the Mangina list. lol