Meet-n-Greets is that swinger clubs are usually a brick and mortar physical locations where people meet other swingers. Socials, groups, and Meet-and-Greets may often meet in the same location, but it is often either a residence or some space that they have secured to meet. However, swinger clubs are typically permanent places that are specifically established for catering to swingers. One of the biggest differences among clubs is the distinction of "On-Premises" or "Off-Premises" swinger clubs. On-Premises swingers lifestyle clubs are ones that offer rooms or areas that permit couples to engage in sex either alone or with others. Off-Premises clubs are ones that allow for couples to meet and often dance or can socialize, but have no areas or rooms where any sexual activity can occur. Larger establishments may include the facilities of an ordinary nightclub such as a bar and a dance floor. Each club sets the rules for activities which take place at club organized events. Some clubs organize events which cater to heterosexual couples or individuals, others to gay men or (rarely) lesbians, and others have no orientation policy. Some cater to non-conventional activities, such as gang bangs, BDSM or fetish. Many swinger clubs will have a dozen or more rooms for sexual activity. The lifestyle clubs are also often decorated in themes, with furniture to match. Rooms may be decorated like a tropical oasis to Arabian Nights to caves to rooms with mirrors everywhere. Most clubs will also have voyeur rooms that have windows where patrons can engage in sex and know that they are being watched by other patrons of the club. Some sex clubs have formal membership and requirements that can include membership fees, showing proof of identity, attending a formal orientation, possibly providing STI test results or showing that one is part of a stable, long-term relationship and is attending with that partner (intended to minimize the number of single males or cheating husbands). Other clubs are open to any person willing to pay an admission fee. Sex clubs normally do not directly advertise to the general public, but typically rely on their own websites, swinger social networking, vertical integration in the adult entertainment industry, or through affiliate promotions on other adult venues. Many clubs, websites, publications, travel agencies, resorts, and events catering to the lifestyle promote each other to their mutual financial benefit but also with the altruistic intent of encouraging