In some places , a `` block session '' of lap dances ( usually a half an hour to an hour ) can be booked in a `` champagne room '' , which is a private room usually located in the back of a club .
In some clubs , a `` block session '' of lap dances ( usually half an hour to an hour ) can be booked in a `` champagne room '' , which is a private room in the back of a club .