Aside from a four hands R&T, my experience has been that it just will not be what you are picturing. In my limited experience, while it may be on all of our bucket lists to try this at least once, it's generally not worth it. It's possible that you may find a location where the experience is everything you were hoping for, but my experience has been that you end up paying both providers the same fee you normally would if you were having an hour with just them individually. You also end up paying the house double the fee because you are tying up two providers. However, once things get going, you generally only have one provider doing much at any given time. It's not like in a porno where you will end up with both providers performing together unless you find a unicorn.
There was at least one review where one of the providers was willing to perform on the other provider, but I do not recall what facility, so you would have to search for that. Generally, each provider only puts in about half the effort they normally would during an hour with you, yet you're paying them the full fee. Also, at least at the locations I have visited, there is a lot of sanitizing every time one finishes with you before the other does anything.
Don't get my wrong, I definitely enjoyed my first experience with it (Katie and Erica at Body Works), but, ultimately, we ended up having one girl leave the room so the other could finish me off because it was almost distracting.
If I could ever find a good independent where I could get two young petite providers, I will try it again and post a review, but so far I have not been able to find two such providers. Every time you try to do anything with the independents it's almost always a bait and switch or the provider is 20 years older than they say they are or 50+ pounds heavier than they say they are. I've walked away every time I've attempted to book anything because the providers have not been accurately portrayed in their ads. If you find a good experience, preferably more than just an R&T, be sure to share it with us all.
Anyway, that's my two cents on the topic...