Theatre is a tough one, but far from impossible. Have you tried local (community) radio stations? I used to host a radio show years ago (in Ottawa). It was a campus/community station, meaning none of us were getting paid. The nice part of that is that we weren’t beholden to advertisers…and aside from music, we needed to fill air time.
I’m sure a quick interview (live or taped) would get you a pretty good reach. It’s an old medium, but one that people still use.