(CUMMINGTON, Mass.) – Jazz greats Charles Neville and Avery Sharpe will headline a musical fundraiser for the Old Creamery Cooperative on Friday, August 26 at 7 p.m. in the Plainfield Congregational Church. Local gypsy-jazz band Swing Caravan will open. The Old Creamery in Cummington, the general store and cultural and social center for the central…