Excellent idea! Especially since there are already variations of sabre colours already in the game, this should mean that adding the rest of the features would be relatively easy. Shops like this need to be in the game, it creates good job opportunities for immigrants as well as filling up a lot of the empty space around the actual city area. There are plenty of places where a shop like this could be built into the bottom floor of a skyscraper, just like how the apartment building already kind of is.