Imo, you ban it as a business. No establishments dedicated to it. Any places that allow a form of it aren’t allowed to receive anything from it. Having any sort of “house” fees that keep a portion of the “winnings” be illegal. This would take care of the most predatory types of gambling. If however some people get together and bet on a game or something, I mean, not a lot you can or should do about that. Let people have their fun but stop those that would take advantage of it.