Seats on the lower level of the auditorium are known as orchestra seats. You will recall that the round area of a Greek theatre that was often used for singing and dancing by the chorus was also called the orchestra. In many theatres, additional seating is provided through the use of balconies. If there are multiple balconies, the lowest one may be called the mezzanine. Balconies are stacked up on top of a portion of the orchestra seats in order to reduce the average distance from any one seat to the front of the stage. L IGHTING AND S OUND There are as many different arrangements of FOH positions as there are theatres that house them. Touring companies that travel with a lighting package usually designate two front-of-house locations: box boom and balcony rail. Once in a particular theatre, the design is modified somewhat to accommodate the existing road house positions. Sometimes there is an actual balcony rail, which is a pipe that has been secured to the front edge of the first balcony. Or there may be a more tra- ditional FOH placement, such as a catwalk or a pipe Many modern theatres have rooms for lighting and sound in the rear of the auditorium and are often called the booth. A position for followspots, which are some- times called front lights, is essential. It is interesting to note that many sound booths are enclosed in glass to provide a sound barrier from the auditorium. That is sometimes okay for sound playback, but it is an awful place to hear the mix of a show that requires sound reinforcement through the use of microphones. Mixers are usually set up in an area cleared of seats in the