Many swinger clubs have rules posted at the door. Swinger clubs etiquette: generally, men are required to be with a woman in order to enter and women are usually fine to come alone. In both cases, a membership is often required, however these are usually available on your first visit for a fee. Swinger clubs have more rules, gay men’s clubs have fewer rules. The etiquette of a sex club is highly related to what kind it is.
However, many people choose to rely on hookup apps (on their phones), a few apps are: Blendr (gay/straight/bi), Tinder (gay/straight/bi), Her (women only), Scruff (men only), and Grindr (men only).
There are sex and swinger clubs in nearly ever state in the US.