So I try to start Curtain Call at the Tampoco and the same thing happens:

I get the info from the front terminal, destroy the only unshielded speaker, run down to the stage and get Vera's hidden key, talk to Domino, pass the Speech Check, tell him I'm coming back there, and then I die.

I once was able to use Vera's keys to get backstage before getting pwned by holograms, but then I died from the speakers. (I destroyed a radio in a dressing room too but it didn't stop the beeping) How do I turn them off?

There are more than one radies, just experiment and once you get the holigram go to the stage area, go to the upstairs (not by the backstage) and play the holotape, it will then allow you to kill him.