On sight, the dog run at downtown's Main Street Garden park is nothing special. There's a lot of concrete, half an agility course and a water fountain that works about half the time. It's pretty small, too, but weekday afternoons, just after everyone gets off work, the concrete patch turns into dog happy hour central. It's packed with big dogs, small dogs and a group of owners who've all gotten to know each other. Everyone gets their play time in and everyone goes home happy.