A business owner can advertise on whatever station they want to. Before retiring friends of mine owned a night club. They were a Country themed night club, so they advertised on the Country radio station. When i-Heart launched the new FM sports station in the market (replacing an AM) they offered them the sports station for a few bucks more, but they turned them down. For a while they had live bands - not just country bands. Whenever they had a rock band perform they advertised on the rock station. Of course that in itself caused problems for those who weren't aware they weren't targeting Country music fans with people questioning online "Why is this redneck place advertising on this rock station." They also experimented for a while with TOP 40 music and on Facebook they were promoting the club on Facebook Pages for the Top 40, Hip-Hop, and Spanish CHR stations.