A lot of your data is in your POS Software and this is another example of how you can use it to boost your profits and give you a competitive advantage.
Go to cash register reports > Sales stock > Sales by Store location for a given period.
Now for this exercise, I put in the last quarter which is what you would do usually, although not much is normal now. You want this exercise a reasonable time frame.
Out will come a report with a lot of what I am sure you will find interesting information.
Here look at the locations with
1) High holding costs and low profits. (Problems)
2) Low holding costs and high profits (Stars)
These are two of the best metrics for gauging the performance of the locations in your shop to see how well you using your retail space.
Now you can experiment.