Photos: Alessio Neri SAN FRANCISCO — Before Chairlift officially parts ways at the end of the month, the Brooklyn electronic and R&B duo Thursday embarked on one last tour, beginning with two shows at Bimbo’s. Chairlift, Miya Folick 9 p.m., Friday Bimbo’s Tickets: $20 (Sold out). Singer-songwriter Caroline Polachek…