The Salt Lake City Library has announced a new and free event happening every Tuesday, starting June 21st through August 9th. Music at Main is a event where everyone who likes to read books and listen to music can come out and enjoy some good old fashion free entertainment for a few hours every Tuesday night. The concerts start at 7pm and will be located at Library Square (210 E. 400S.). The first event starts this Tuesday, the 21st, with Theta Naught & the 321s.