The Market Street Singers is a large choral ensemble and tour-de-force, always looking for a larger venue in which to perform. Artistic director Chris Vincent predicts tight, but merry quarters during this year’s free holiday concerts at Ballard First Lutheran Church, 2006 NW 65th St. “Your Holiday Song” will have a first performance 7:30 p.m. Saturday, Dec. 7, and then at 3 p.m. Sunday, Dec. 8.