Hey Jude
As a rule its 1 male per tank but you can keep more than 1 female together , at the momment i have my two females together in my 2nd community tank and not only are they fine but just love hanging around together.
You can keep females and the male together too, but have plenty of hiding places for the female because if he wants to mate and she doesn't he can get very aggressive towards her and could even kill her.
I think they are neat fish too, ours nested and we watched them under the bubble nest release eggs, i took the female out when they finished and left the male looking after the nest but nothing hatched. i'm letting her rest in her old tank for a few weeks before trying again.
Good luck with your Jude