The houses on a typical street in Taiwan are narrow and tall, much like town houses. Commonly not more than maybe 3 meters wide. On the ground floor it looks like a garage with a metall door that can be raised all the way to the ceiling. In most cases there are some sort of commercial activity on the street level and I guess that they live upstairs. It might be a restaurant, garage, mechanical work shop, hair salon or any type of shop selling a wide variety of things, from clothes and watches to motors and scooters.
Sometimes it is hard to figure out what they are up to. Often the place just looks like a normal messy garage but if you look closely you can see some kind of product laying around. Business does not always seem to be very good and there are usually no particular opening hour. So to make sure they do not miss out on any customers they simply move their livingroom halfways out on the street. It is not uncommon that you have walk around some people watching TV on the sidewalk.
It can be tricky to walk down the streets of a Taiwanese city. The sidewalk is full of scooters, cars, tables, trash or anything really that they can not (or do not want to) fit in the house. You simply have to step out into the street and risk being hit by a car or racing scooter.
Often the same type of shop is clustered in one area. The other day we found the wedding area, several streets only containing shops selling wedding clothes. When we turned around one corner there were instead only jewellery shops. We had to walk several blocks before we found any type of restaurant which we were really looking for.