4 concerts coming up this weekend

• Sausalito Jazz and Blues by the Bay and Performing Stars of Marin present Bay Area zydeco musician Andre Thierry at 6 p.m. Friday at Gabrielson Park in Sausalito. Admission is free. Go to sausalito.gov.

• Dirty Cello, a blues-rock-Americana band led by Bay Area cellist Rebecca Roudman, performs an outdoor show at 7 p.m. Friday at Rancho Nicasio at 1 Old Rancheria Road in Nicasio. Admission is $29. For more information and to buy tickets, visit ranchonicasio.com.

• Minnesota folk singer-songwriter Ian George performs with his band at 8:30 p.m. Friday at Smiley’s Saloon at 41 Wharf Road in Bolinas. Admission is $12.51. For more information and to buy tickets, go to smileyssaloon.com.

• The fifth annual San Rafael PorchFest features more than 70 artists performing on porches throughout the Gerstle Park neighborhood from noon and 5 p.m. Sunday. Admission is free. Go to sanrafaelporchfest.com.