After the concepts of nail and even hair bars, a chignon in a flash, check out the colourists' bar and how to choose your hair colour in minutes with the help of a professional...Following the success of the Chignon Bar, celebrated hairstylist Christophe-Nicolas Biot develops the concept of the Colourists’ Bar. The idea: be advised in your choice of hair colour and be able to return home with genuine professional products.