Melb Swingers venues

Hi there - my wife and I often use various fantasies during our love-making, FFM/MMF and she loves it - talked over it a lot about doing it for real and she goes very cold on it - I think it's just she freaks out..she so gets off on it at the time then goes so cold, it can be a little confusing. We both get really hot talking about sharing partners, her playing with another girl and so on.. Was wondering if there'd be any likely spots/bars etc where we could perhaps go one night where we may meet the right kind of couples and see where that leads ? Waling into a full on party would not go down well so hopefully someone can point me in the right direction.. Thanks !