I was at the Billy Joel concert (referenced by Greg above) at the Garden the night the Mets won Game 6 in Houston. I, along with what seemed like about 500 others, stood outside the hotel across the street (the Pennsylvania, maybe?) and watched the final outs on the TV of the hotel bar before heading in. The concert started late, as no one was entering the Garden while the game was still going on. On stage, there were Mets hats left at each of the band members spots on stage. Billy apologized for starting late, but they were watching "a ball game." Throughout the show, he gave updates on who was winning the Angels/Red Sox Game 7.