A lock off is a type of 2 BR, made up of a 1 BR plus a studio with a shared connecting door.
Depending on the traveling party, some people prefer a lock off, so a second couple gets their own private entrance and mini fridge, for example. Some people, like those with small kids prefer a dedicated 2BR,so there is no extra door for anyone to sneak out.
Sent from my iPad using DISBoards App, please excuse any typos or autocorrects!