I don't think there's any magic formula.
Obviously you need to take the usual precautions when meeting someone new, etc... I won't bore you with all that as I'm sure you've heard it before.
The big question is whether its right for you?
Meeting separately works perfectly well for us, and we do so about as often as we meet together.... though to be honest when we attend clubs together we usually go separate ways anyway.
The main reason we started was the simple problem of finding couples who are attractive to both of us and /both/ play; we do obviously, but there are lots out there who don't. That extended into meeting singles / unicorns rapidly of course. It makes overnighters much easier, and saves a fortune on babysitters