In 1993, I saw the Thomas Chapin trio (Michael Sarin and Mario Pavone) at the Pitt Gallery in Vancouver. That was just an incredible performance, one of the most exciting I've ever heard.
Then in late 1994, I saw him with a different group, Two Bass Hit, at the Alterknit Theater in the Knitting Factory. This group had Reggie Nicholson, Pavone and another bassist.
And I got to see the trio one final time in the main space at the Knitting Factory, before a packed, standing crowd, April 5, 1997. Chapin was ill at this point, but still managed to reach some astounding peaks during the concert.