Author: Louise Hoffman Broach When Warren Haynes takes the stage with Gov’t Mule, you never quite know what you’re going to hear, except you can be sure the vibe will be good. That was certainly the case July 24 at Point of the Bluff in Hammondsport, a winery overlooking Keuka Lake in Steuben County. A few years ago the winery added a laid-back cozy concert venue that was perfect for the likes of the blues-rock style of Haynes and the Mule. Go…