Training rooms is a category in the market that includes rooms related with class training.
Training rooms consist of rooms that train the various classes of your dwellers. This category includes rooms like the Fighter Training Room, Kitchen, Mint, Laboratory, Crafting Shop and Foundry, which train your fighters, cooks, treasurers, alchemists, carpenters and miners respectively.
Placing dwellers into rooms which are upgrading will reduce the time it takes to complete its upgrade.
|Fighter Training Room||Kitchen||Mint||Laboratory|