Go there tonight if calling doesn't help. I wouldn't count on it being a very smooth process at the beginning but if you explain yourself at the door I'm sure they'd be willing to help.
There is some ada seating but you will need to talk with box office in person. If you can get to show early and pick your spot. The Troubador should take good care of you and yours.
I remember ADA space near the stage by the entrance.
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