This enthusiastic and well-organized bunch envelops you in its team mentality. It's infectious. It's almost a better way to meet people if you're new to the city than singles night at a club, or joining Match.com. Whether you're training for the Escape from Alcatraz triathlon, a century ride, or just a shorter 10K walk, Team in Training hosts weekly sessions and clinics on injury prevention, nutrition, and race-day tips. The incredibly supportive mentors and coaches do laps around the Presidio on their bikes and wind sprints at Kezar Stadium, as well as longer weekend workouts, parties, fundraisers, and beer crawls. They like to party while they get in shape. Plus you're raising money for a great cause — the Leukemia and Lymphoma Society.