The Mystery Zone is a private membership lifestyle club on FM 1960 East in north Houston, about a mile and a half east of Highway 45 and roughly nine miles from George Bush Intercontinental Airport. It welcomes couples and single ladies only, and opens on Friday and Saturday nights. Membership includes access to private party rooms and a smoke-free lounge. Guests are screened before entry. Friday nights are casual, while Saturday nights have a theme dress code; flip-flops and ball caps are not allowed.