The dream of the 60s is alive in... Nob Hill? Rub elbows with fashionable flower children at this tony destination, as bubbly purveyor Veuve Clicquot pops bottles in honor of the 50th anniversary of the Summer of Love. Craft a flower crown to complement your hippie-chic ensemble and enjoy tasty treats (think champagne popsicles) and games in the rooftop garden.