The barber chair can be built in any settlement. Once a settler is assigned, the Sole Survivor can use it to change their hairstyle without needing to go to an already existing barber, like in Diamond City. All sessions are free of charge and give a Charisma boost that will last until overwritten with a different boost.
Barber chair (1)
The barber chair can be located in the build menu under Resources > Miscellaneous.
Behind the scenesEdit
Early descriptions of the add-on implied that barber chairs could also be used to change the hairstyles of other settlers (similar to barbershops in Fallout Shelter). However, this was omitted from the released version of the add-on for undisclosed reasons.