"Studio" means a structure (or portion of a structure) for use by artists or professionals, to include architects, sculptors, photographers, music and dance instructors, and similar users. (Added by Amended Ord. 02-064, Dec. 9, 2002, Eff date Feb. 1, 2003; Amended by Amended Ord. 16-013, Mar. 8, 2017, Eff date May 7, 2017).