Westin Charlotte unofficial charging option

This is probably of value only to people who stay at the Westin Charlotte since there are many better options Uptown. However, if you're staying in this hotel anyway there a a handful of 110v outlets in the parking garage. Nobody in the hotel seems to know it, but there they are. I am using one of them now, just maintaining my charge from the Charlotte Supercharger to the North. I am getting the typical 111v/12a/3mph, plenty for maintaining my charge just prior to a long trek southbound. The ones i have seen are facing the outside of the parking stalls, installed in the vertical support pillars and very obvious when passing by.