I wouldn't do more than 2 pairs, for small cichlids they can easily claim a 2' area. Maybe three pairs, if aquascaped properly. I'd get a bunch of juvy's and let them pair on their own like most cichlids though.
My Blues don't hide if that is what you are worried about. Also, I had 2 pair up within 6 hours of putting the females in and eggs were layed the same night. Since it was their first attempt, I didn't expect much and the eggs were gone by morning. We'll see in a month if they try again.