I remember being at a concert at Penn's Landing ca. early 1990's, where Brad Mehldau was playing with Christopher Hollyday (and whatever happened to him? Talk about channeling J-Mac, he had it DOWN). Piano was horribly out of tune, Mal Waldron at the Five Spot out of tune. Mehldau changed his entire style on the fly to minimize the impact of the piano, got into this very compact Jazz Messengers Cedar Walton sort of thing as opposed to the more open, flowing things he started the concert with. I gained a lot of respect for him as a sideman that day (though his leader stuff still puts me to sleep). I think Christopher Hollyday is based in San Diego and has been for many years. Just found a reference to him playing a concert there last month: http://www.meetup.com/sandiegojazzmeetup/events/224633392/