Man's best friend couldn't be a better wingman. Load up Billy the beagle and Oscar the wiener dog and head to Penn Valley's dog park. The 2.7-acre, fenced, off-leash park brings dog people together from across the city. If you're lucky, your friendly mutts will break the ice, leading to an easy first date. Wanna meet at the dog park? Bonus: Billy and Oscar might find butts of their own to sniff.