Ale House String Band will perform at 6 p.m. Friday, July 29, at Waterfront Park in Gardiner. The concert is part of Johnson Hall’s free Summer Waterfront Concert Series. The Ale House String Band was a happy accident. Oren Robinson is a classically trained vocalist, Brian Dunn is a wandering soul who picked up music along the way, and April Reed-Cox has a master’s degree in music performance. The three have an uncanny ability to improvise music on the spot. FMI: www.johnsonhall.org.