rendezvous x users at a time

Was trying out rendezVous and it appears it will only stop the first x number of users to hit that point. Does anyone know of a way to make it wait for every x number of users? I have a scenario where groups of users need to sync up such that 4 users will send 2 different requests at very close to the same time. Currently it works just fine for the first 4 users but then everything after that goes by the rendezvous altogether.