Country Festivities in the Grocery Store
Now, when we say there is no dress code to go to a grocery shop, this is what it could mean. That you could wear what you want. This woman clearly has plans after shopping, and it is very likely that she will visit a country song festival or is going to take part in a dance number in the fairgrounds.
Source: Pinterest
Also, her colorful garb might attract children who have come to shop, which is nice because it will distract them from throwing around goods from the aisle.