I was invited to one of these, though I didn't go, I hear their nice.
The closest thing I've experienced are the clasrooms where there may be hearies, but we're told NO VOICE
Anything you have to say..say it with your hands.
As an ASL student and not an interpreter, I'm often told that when I "speak" to interpreters, NOT to voice, but to sign.
This actually does help; but in the case of a public outing, you will blend in better with the crowd in for which you've been invited.
