This once small struggling racetrack with aging facilities was taken renovated by Eager Ernie, and is currently occupied by a gang of raiders and Triggermen who use the track to host their robotic races. However, they have to pay protection money to Wire, so they have begun to fix their own races.
To the west of the racetrack is the track's clubhouse and stands. The racetrack surrounds a camp of makeshift wooden structures. Notably, there is a metal shack on the south end of the camp which contains an weapons workbench; directly north of this shack is the racetrack's repair shop, which contains an armor workbench; directly northeast of the metal shack is a wooden shack with a chemistry station in the ground floor. A cooking station lies in the middle of the camp.
A couple of shacks on the north and south ends have stairs which allow one to traverse the network of bridges around the camp. Following the bridges west leads back to the second story of the clubhouse, which is being used by Eager Eddie to announce the races.
↑Fallout 4 Vault Dweller's Survival Guide Collector's Edition p.341: "[4.25] EASY CITY DOWNS This was once a small, struggling racetrack with aging facilities. It is currently occupied by a gang of Raiders and Triggermen who use the track to host their robot races. Eager Ernie is in charge here and has a key and password to unlock any doors, allowing easy access to the downstairs clubhouse terminal (Expert) and upstairs master control terminal (Expert), as well as the Repair Shop (Advanced) and Robot Control Terminal (Novice) out in the track. Both terminals allow you to control the racing robots; come evening, they turn against their masters. There are some reserve robots to activate in the south warehouse, too. Watch for items to scavenge everywhere; don’t forget to check the bus (two are locked [Novice])." (Fallout 4 Vault Dweller's Survival Guide Map)