1995 according to the Black 47 page (where they say they’ve played Shea more times than the Beatles who never had the Mets open for them), was the first time they played there and to the best of my knowledge was the first Irish Night. I think they continued into Citi yet may have stopped it.
Then there was “Disco Demolition Night” in 1979 at Comiskey. They blew up some albums, the fans rushed the field and set them on fire.
I’m trying to think of a 5 cent beer night so I’m thinking the Brewers? Maybe Comiskey again. It went off about as well.
ETA: 10 cent beer night in Cleveland against the Rangers. They’d done it before NP but this time the fans (and players?) had some grudge against the Rangers.