Personally I would hold off if I were you. The numbers in this city are rising and the last thing you need to do, is expose yourself to not just one other person but 2. I'm not trying to Covid shame you, just friendly advice.
That said the key to a duo, is finding 2 ladies who are truly into it. There are a lot of ladies out there who offer duos because there is a demand but all it is is one on one, with each of them taking turns, while the other one watches. They are not into it. You need a couple of ladies who are bisexual and into each other, in order to get the true duo experience, which should involve then pleasuring you and each other. I'm sure you get the idea.
Just picking 2 random girls won't give you the pleasure you desire.
My advice would be to talk to the first lady and ask her if she does duo's. Then ask her with whom. Be clear and tell her you are looking for a fully interactive session just to make sure everyone is on board. Anything less is just paying 2 SP's to do the job of one.
BTW, I personally am not into duo's. I like to focus my attention and energy on one woman becsue for me that provides the most plesurable experience, both intellectually and physically. But that's just me.
Cheers
J