Donald Trump at one of his golf courses in Dubai. (TrumpGolfDubai.com)

There is one clear downside to Donald Trump's desire to bar all Muslims from entering the United States: A lot of his company's meetings with its business partners will need to be held overseas.

The extensive conglomeration of businesses that bear the Trump name — either because of his active involvement or thanks to one of his lucrative branding deals — spans the world. The sun may never have set on the British Empire, but on the rare occasions it sets in the empire of Trump, guests who are watching enjoy the classiest views and most luxurious cocktails. And that holds true for Trump's customers in the heavily Muslim countries of Indonesia, Turkey, Qatar, Dubai, the United Arab Emirates and even Azerbaijan. Multiple golf courses, hotels and housing projects bear the Trump name in those countries, as do consumer products in stores dotting the Arabian peninsula.

The Financial Times estimates that Trump earns at least $3.5 million a year from licensing agreements on just two of those properties. The Trump PRVT "mansions" near his golf course in Dubai sell for $1.8 million each — although it's not clear how much of that money goes to Trump. The point being: Trump makes an awful lot of money from an awful lot of people he'd rather keep from entering the United States.

Below, a necessarily incomplete map of the places where Trump has business partners in the Muslim world. Let us know in the comments if we've missed any.