C. F. Martin & Co. (Martin Guitar) invites guitar and uke players of all levels to perform at Summer NAMM at the Martin Guitar and Strings Open Mic event, part of the Make Music Experience, on Saturday, June 30 at the Music City Center, in Nashville, TN, from 10 a.m. – 5 p.m.  Attendees will be able to sign-up to perform a song during the Martin Open Mic in Lobby D of Music City Center, directly off the Summer NAMM exhibit floor. Everyone who plays will receive a Martin T-shirt, a set of Martin strings, and will be entered to win a Martin Guitar. The guitar winner will be selected at random from everyone who performs that day.