Hayley YoungIf you’ve got nothing planned for lunch today, maybe you should forgo food for musical sustenance. Hey Marseilles, fresh off a West Coast tour, will perform a totally free show at noon at the Harbor Steps, 1221 First Ave. (Unless you’re already downtown, you’d best get a move on. There’s only an hour left ’til showtime.)The show is part of the Downtown Seattle Association’s “Out to Lunch” Concert Series. Hey Marseilles’ performance will be the third of the series, which runs until September 3. If you can’t make it today, the band will also play a free in-store at the Ballard Sonic Boom Records on June 29.