By Denny Dyroff, Entertainment Editor, The Times Fitness July 17 is a Tuesday and Tuesdays is not usually the best day of the week for a selection of live music at area venues. Mid-week shows are a tough draw – especially Tuesday’s following a summer weekend. This year, July 17 is an exception. The area music calendar features shows by Fitness, an electro-pop duo from L.A. on July 17. There...