Maynard sporting a Merkin."What if he doesn't show? Are there enough fans for a riot?" asks a 20-something guy waiting in line at a Boca Whole Foods for Tool-frontman-turned-winemaker Maynard James Keenan. He's in town on a promotional tour, signing bottles from his winery, Caduceus Cellars, and vineyard Merkin Vineyards. It's 1 p.m. and a line of about 40 fans snake around the outdoor herb and pottery section directly in front of the store. "It's too hot for a riot," responds David Chase, a 31-