I don't know if this will help you or not, but when we go we usually just call the ticketing place and ask them if they are doing a Girl Scout program this year (they always do) get the details, and book that way. Of course you should be a Girl scout to do that and it is usually an "On your honor" type of thing. I don't know if you would qualify but they may do other organizations as well. It never hurts to call and ask!
They do limit it to certain showings but occasionally it comes with some extras like a cool patch. Once at the circus they had a thing where on Girl scout day we got to come early and meet the performers. It was pretty cool.