During the temperance movement, the idea of "tearooms", places where you could relax and enjoy non-alcoholic refreshments in differently themed rooms, became popular in Glasgow. This one, designed by Charles Rennie Mackintosh in 1904, was the most popular of its time and has been lovingly restored. Make sure to have a look at the Room de Luxe on the second floor (access through the cafe on the first floor). You do not have to purchase anything if you just want to have a look around and ask nicely .