As @VascoFCosta said, you should create a network per physical location. Since you don't want the same config in each location, you can then manually configure the SSID and settings for each network. If you do in the future want to unify the configuration, you can use a template and bind it to all the networks and then the config will be uniform across the sites. This is probably the most common deployment type since typically people are looking to unify management across sites.
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