Ask HN: Where do you take your dog(s) for exercise?

Interested to know which parks are best for off-leash fun and/or socializing.

I just launched a meetup group for Bay Area Startup & Dog Enthusiasts, and am in need of future meetup locations, preferably a mix of some in San Francisco & others on the Peninsula. Would love to know where people already go.

http://www.meetup.com/Bay-Area-Startup-Dog-Enthusiasts/