Current research has suggested that sex, sexual practices and sexual identities are increasingly being folded into people’s leisure and recreational activities. One area that has witnessed growing popularity has been sex clubs that market themselves as places that enable heterosexual casual, anonymous sexual encounters. Traditionally called swingers’ clubs, these are not strip clubs, lap dancing clubs or brothels, we have very little information about sex clubs or the people who visit them. In response, this article defines what sex clubs are, their geographical locations, and their facilities. Alongside this, through the data scraping of 6837 profiles of people who have visited clubs and left online reviews of the clubs that they have visited, this research provides the most extensive dataset available on the gender, age, relationship status and sexual preferences of sex club patrons. The findings from the study suggest that sex clubs are an emerging space for leisure sex that prioritises erotic practices that stand outside heteronormative norms and values. Whilst clubs have been traditionally associated with swinger communities, the findings in this article also suggest that sex clubs appeal to people with diverse sexual preferences. Alongside this, it highlights the potential ways in which sex clubs may be part of a broader spatialization of leisure sex. The article concludes by suggesting that in a post-Covid context, sex clubs will have increasing importance as places of leisure sex.