I thought buttons were only to be kept in pairs when they are mature. I don't know what happens if you have them in a colony. I just keep reading "buttons in pairs" here.
Most people on here recommend keeping them in pairs, but I have heard of people having success keeping small colonies of all male or all female and even one male with 2-4 females with no problem at all. Buttons are supposedly monogamous, but from the stories I've heard I would say that's not entirely true as I've spoken with someone who had a male with two females in an avairy and both had clutches at the same time from the same male, so....I suppose it depends on how much space you have. In a small cage, the females may be likely to fight with each, but if you have a large enough avairy space? Maybe... 













