I agree with at least 10 from a water quality standpoint, but from an aggression standpoint, no way.
IME, muliple males of the same species are very bad news with rams - I've even done it in a 55 - it's not enough room and they fight each other until the weak one(s) die. Multiple females is not as much of a problem.
I've also had Bolivian rams (if you mean microgeophagus altispinosa) harass blue rams to the death. Golds and blues together are not as bad (i think the gold is a mutation of the blue?)
A trio if 1 male and two females work well - and then you have room for other fish!
hth,
windsurfer