It’s been almost 37 years since San Francisco’s “Summer of Love,” but good vibes of another kind can be had at this Saturday’s at Fort Mason. ZAP’s festival draws groupies with red-stained teeth from all over the country, who enjoy the wide range of zinfandel styles offered by 300 California wineries. Plenty of Delta, Lodi and Sierra-foothills wineries make the party. The local grapes also will show up in some fancy labels from outside the region. (Napa’s Turley Wine Cellars pours a Dogtown Vineyard Lodi zin that retails for an astounding $75.) The tasting goes from 1:30 p.m. to 5 p.m. A limited number of $55 tickets are available at the door starting at 11 a.m. Unlike those days of 1967, you taste from a glass rather than a jug, and an overdose can be avoided simply by spitting. Find out more at www.zinfandel.org.