A SUPERMARKET SUPERFESTIVAL Can you believe it? A two-day jazz extravaganza held inside a high-end grocery store? It's the Gibson/Baldwin Jazz Festival slated for Nov. 3-4 at the newish Whole Foods outpost on the corner of Bowery and Houston, and it's free. Scheduled to appear, among others, are guitarists Jack Wilkins, Howard Alden, Paul Abler and Joshua Breakstone; pianists Allen Farnham and John DiMartino; and trumpeter Ted Curson's Spirit of Life Ensemble. Yusef Lateef will also be on hand to sign copies of his new autobiography. The hours? It'll be 5:00 to 10:30 PM on Saturday, then 2:00 to 8:30 PM on Sunday.