Friday, from 8 to 11 p.m., Andy Penk, left, will perform at Pedro O’Hara’s, 34 Main St., Lewiston. Penk is a senior at Cheverus High School. He sings, and also plays guitar, piano, alto sax, soprano sax and bassoon. Penk is the founding member and lead singer of Spectrum, a Greater-Portland area band. His musical influences include Bon Jovi, Ed Sheeran, John Mayer, Stevie Wonder, and U2. On Saturday, Dum Bums (Josh Harps and Tom Gurney) will perform from 8 to 11 p.m. There is no cover charge either evening.