The San Luis Obispo Downtown Association proudly announces the 2015 Concerts in the Plaza musical lineup. 2015 marks the 20th Anniversary of the most popular free concert series on the Central Coast. From more than 80 applicants (a record!), 14 of the area’s greatest musical groups were selected to play for the upcoming Concerts in the Plaza season that kicks off Friday, June 12 and runs every Friday through September 11.