Here in Austin, we contact the venue directly. On the website where they are selling their tickets... there is usually an "accomodations" or "accessibility" option. Contact the venue and request an interpreter. DO IT WELL IN ADVANCE as they will try to "relocate" you if you have great seats. Concerts ARE included but you may have to "convince" them. Do consider your approach. Be cool! Even if they say no. Sometimes we are too blunt for our own good. Please note that a good attitude is very important when you are having a dialogue with a venue host regarding a specific accommodation (interpreter) you are requesting... so that way it would be most likely that they will successfully accommodate you.
I suggest sending them a letter asking if they are aware of Title III of the ADA which pertains to public accomodations. Note the bolded word for you...
Americans with Disabilities Act | National Association of the Deaf
More on public accommodations at another link below... Often they will try to "determine" your accommodations for example... movies and their awful closed captioning glasses. Don't let them decide for you!
Public Accommodations | National Association of the Deaf
I got my wife tickets to Bon Jovi for Christmas and they will be providing her and her companion with an interpreter. I'm not going as I'm just not interested in music but she loves it.
