The theater features a front lobby area as soon as you walk inside. You will see a receptionist desk, which was most likely used to check in performers or take tickets from guests. There are two doors, to the left and to the right, which both lead to the same area; however the one on the right is locked and you need a Lockpick skill of 50 to enter. As you enter the theatre you will see that its layout is similar to an "Old World" dinner theatre with many tables, chairs, and a large stage in the center. Located in front of the stage there is a music stand with Vera's music on it, which contains a hidden key to the backstage. To the right of the stage is a locked door that requires a key. To the left is the main door to get backstage. From north to south, the backstage area has Dean's dressing room, a large room with crates and props, and Vera's dressing room. Across from her room, there is one small upstairs section with a hologram emitter.
Hologram emitter locations
There are three security holograms that appear after you find the backstage key, and there's an emitter for each of them in the Tampico theatre. One emitter is located directly behind the north-side backstage door, and it shuts off the hologram that patrols the southeast corner of the theatre. Another is hidden behind the corner couch in the large backstage room to the west, that controls the hologram patrolling the north-east side of the theatre. The third is on the stage room staircase wall, and it is inaccessible until you play the holotape in the projector that overrides any remaining security.