Bi Sexual Swingers
Swingers are by nature a very open minded group of people, and have always been more accepting of people who are a bit different.
Bi sexuality in the swinging scene is a good example of this, as bi-sexuals have always been accepted and catered for.
Female bi-sexuality is pretty much universal, with more than 75% of females and (the females half of) couples advertising on the internet claiming to be either bi or bi curious.
Male bi-sexuality is not so wide spread, with less than 50% of males claiming to be bi or bi curious, although this number is on the increase, and clubs are starting to cater for this trend by holding bi nights, where most if not all of the attendees are bi sexual.