Shocktoberfest, a spook-house in Sinking Spring, PA, is running a Naked and Scared Challenge where customers traverse the maze in the altogether. It's advertised as a means of self-diagnosing "Gymnophobia - the fear of being nude."
Procedure: The Naked and Scared Challenge allows participants to go through the Unknown Haunted House Nude or Prude (either totally nude or with underwear). It takes place at the end of the night after all customers have gone through the attraction. Participants must be 18 years of age or older and must sign a waiver. Participants undress in a semi-private preshow building, experience the Unknown Haunted House, and then exist into a semi-private fenced courtyard where they will get dressed. Participants are never in view of minors or non-participating customers. Naked and Scared Challenge is not offered on Sundays.