stalls aisle circle dressing room stage box office row backstage boxfoyer 
where actors put on their costumes and makeup.
the area on which the performance takes place
.a line of seats .a way down from back to front between seats.
an area of downstairs seats.an area of upstairs seats.
the theatre entrance hall where people meet before going in.
the place  where you go or phone to buy tickets.
the whole area out of sight of the audience.
a little private balcony with 3-5 seats only.