I would treat it as if you're watching a movie at a theater, or a play. Be prepared for one of the adults to take the baby out of the room if it starts to fuss. As long as you go in with the expectation that you may have to miss part of it, then it should be fine.
We have been twice and I don't think I've seen many children under the age of 3 there.
I agree with the PP, it can be LOUD. Lots of beer and Sangria, singing, yelling, etc...