I have both a male and female Betta in my community 75 gallon tank, which has loads of other fish -- tiger barbs, tetras, angelfish, loaches, livebearers, you name it. Both get along fine with each other and everyone else. There is some acclimation involved, like the Betta may be picked on at first. You can trying waiting this out, or be ready to give the Betta its own tank.