It has worked for me for a year BUT I would not recommned it and I certainly did not do it on purpose. One of the young females I got turned out to NOT be a female and was incorrectly labled by petco. He lives with 5 females in a planted 20G. I keept him with the ladies only because I have never seen any aggression other then chasing and flairing. And seldom nipped fins - even then its usually the girls going at it and not him. Since they have been together since they were very young and it has been about a year - and since a soroity is a risk in general, I figure I might as well just let him be.
I did walk in one day and found the one in my avatar floating in a C shape and him chasing off after something. Took me a minute to realize they were "getting it on". It was a pretty cool thing to watch. It would of been even cooler if at least one egg managed to hatch and survive.
He was NEVER aggressive as he got older so the only clue I had was his fins were getting longer...