For tourists, it’s still quite a nice experience to do some window shopping. Some designs are quite nice, and it may attract your attention. Otherwise, it is still nice to explore places that locals frequent. It is after all one of the big landmarks in Vientiane.
Also note that the section next to the park predominantly sells clothes and accessories. If you are looking for the food, you would have to head further south, cross the road and head towards the bank of the Mekong river.