Longevity among jazz groups is a surprisingly rare commodity. With relatively few exceptions, a run of a few years, at most, is standard; for a collective of jazz musicians to stick together for a decade or more is almost unheard of. That puts Fourplay, who celebrates their 25th anniversary this year, in a league of their own. Since 1990, bassist Nathan East, keyboardist Bob James, guitarist Chuck Loeb (who joined five years ago) and drummer Harvey Mason have continued to explore together, their efforts resulting in what All Music Guide called one of the most intuitive, forward-thinking and focused groups in modern jazz.