The Chris Bradford's Dojo chain are dojos owned by the Foot Clan which they use to train and recruit new members to the Foot Soldiers.
New Friend, Old Enemy - First debut
The Pulverizer Returns! - Timothy reveals to the Turtles that he was training as Donnie said to, but it was in one of Bradford's Dojos and Tim got into the Foot Clan.
Follow The Leader - Leonardo is taken to Bradford's Dojo to improve Karai's Foot-Bots abilities.