MUSIC: San Jose indie folk collective, The Mumlers, who are named after the "scandalized 19th century spirit photographer" William H. Mumler, will perform at Brick and Mortar tonight, along with guests He's My Brother She's My Sister and The Soft White Sixties. (9 p.m., Brick & Mortar Music Hall, 1710 Mission Street)

WALKING TOUR: City Guides presents its annual Ghost Walk at Palace Hotel, which explores tales of kings and presidents who have died here; gunshots that echoed through stately corridors, and romances that ended tragically. (6:30 p.m., Palace Hotel, 2 New Montgomery Street)

FILM: SF Film Society presents as part of the French Cinema Now festival Four Lovers, in which "[t]wo successful married couples looking for something new decide to share partners on an ongoing basis." Titillation and then tension ensue. (9:30 p.m., SF Film Society | New People Cinema, 1746 Post Street)