I know the big theater in town here is a union
house and thus they have very strict rules about interns doing tech work (If an intern does the job for next to nothing that's taking away from the paid work of a union member). They are allowed some tech interns for summer stock but even then its very strictly regulated. Most interns there are administrative. You might try calling the local union office and asking for a list of Union houses and then approach the theaters NOT on the list about internships.
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