The acceptance of singles at swinging events varies from geographic area to geographic area and event to event. Some swinging "clubs" have a policy of allowing only couples and females, but most do allow single men on selected nights. Single females are often admitted at reduced admission price. Parties and private events may differ, however, and are often restricted to couples or couples and single females only.
The reasons for this vary. Most (but certainly not all) of the people who pay to participate in swinger events are male-female couples and most swinging couples are more interested in interacting with other couples or with single women than with single men. Thus, swinger events strive to achieve a balance between male and female participants or have a (usually slightly) larger number of females than males.
A common complaint among swingers is that single men change the tone and nature of event. While outright hostility towards single men is rarely prevalent, an abundance of single males is rarely looked upon favourably in any swinging context. When single males are permitted their numbers are usually limited by high entrance fees or stringent membership requirements.
In the UK, swinging nights which are designed for catering to women who want multiple men are referred to as Greedy Girls' Nights and they are, to all intents and purposes gang bangs. They are often held in swingers' clubs (on less busy nights) or take place as private parties. These are attended by both couples and singles, a proportion of which are sometimes prostitutes.
Some swingers oppose the involvement of any singles of either sex in swinging because of the fear that they might split existing couples. While this might be a fear of some new couples, couples who have been part of the "Lifestyle" for some time report that the only way a couple can "split" is when one of the couple is looking outside the primary relationship. This is not the norm in a swinger relationship .
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