yes, subterranean
A few more ideas about the subterranean music venue from the previous post.
The stage where the band performs at the floor level of the cylinder will rotate at a very slow rate, so that the band faces everyone as it spins around.
The whole decor will be Tron based, even to the point of seeing if it is possible to have a uniform that the servers wear that have light strips on their sleeves, along the sides of their body and down their legs on each side of their body. A bonus feature would be if the light strip colour could be changeable and change in the same way that the light decor within the venue changes. We would used a standardized portable battery of which we buy 100 so that some are charging while others are in use.
Beneath the stage will be a service area to maintain the stage rotation system and for any wiring to get from the musicians to the audio control booth. The audio control booth will be on the first balcony above the stage.
Beneath the service area will be an extremely large cistern to catch any rain water or any water ingress. Anywhere that water could potentially get it, it will be directed to enter the cistern. Especially during our more extreme rain storms there is this risk; so I would have the cistern large enough that it can continue to accumulate during a major rain storm, and then, once the storm has well passed, the water there can be pumped up and out into a storm drain at a controlled rate.
I would aim the size of the venue to have a 500 guest capacity, with 50 servers and the band members. A further thought I had was to have an entry that is recessed into the commercial building but quite a distance, perhaps 12m. For the length of that passage, have a transition from a standard commercial decor to the Tron decor. On the wall where the elevator is, have a vertical strip of lights to the left and right of the door that light up in a vertical growing fashion (from bottom to top) if the elevator rises up to that level, is fully lit when the elevator is at the level, and the lit lights go out gradually downwards as the elevator descends.
Inside the elevators, have again vertical strips of lights, perhaps two on the far left and right side of the front and back wall of the elevator. Have a 10cm off 10cm on pattern of lights move in an upward direction as the elevator descends, and downward as it ascends and stay still when the elevator is stopped.