Facebook Fit Miami was in the Design District Thursday morning to help local business owners grow their companies. The 400-seat room was filled to capacity. Small business owners, like Sebastian Rusk from Social Buzz TV, attended. What draws over 250,000 people from all over the country to go RVing on BLM in Quartzsite, AZ each year? That was actually a question we asked ourselves. That is, until we spent our…