Beta cities are "cities that link moderate economic regions to the world economy." They're not your top-level economic hubs like New York, London, Tokyo, Dubai, etc., but they're the next tier down. Name 'em!
Based on the 2016 study by the Globalization and World Cities Research Network.
For reference, here are some Alpha- cities: San Francisco, Bogota, Vienna, Riyadh, Guangzhou, Melbourne
Here are some Gamma+ cities: Cleveland, Managua, Saint Petersburg, Durban, Osaka, Adelaide