People around here don't really seem to notice or care. Around here, Las Vegas, it seems relatively well known which businesses are and are not ok with OC. Most of the daily stuff like groceries, starbucks, restaurants, people don't notice or care. Casinos, a few big chains, and malls will ask you to leave.
I don't OC that often, some of the places I go firearms are prohibited, and others like the movie theater at a casino will ask you to leave. Which leaves me either CC or not carrying.