IS TRIVIA AN INSTRUMENT? “Who lives in a pineapple under the sea?” We know you’re shouting “SPONGE-BOB SQUARE-PANTS!” right now. See? You’re already showing how great you are at “SpongeBob SquarePants” trivia! Trivia Mafia is celebrating 25 years of hanging out at the Krusty Krab, inflating our Anchor Arms at the Goo Lagoon, and road-tripping…