A recent survey has ranked Geneva, Dubai and Miami as the world’s most expensive markets for hotel rooms, Bloomberg has reported. In Geneva, the average cost for a night is $308, followed by Dubai at $273, Kuwait City at $253 and Zurich at $250. Miami is next as the costliest place for lodging in the US, at $245 a night. According to the index, compiled by Bloomberg, the world’s cheapest market is Hanoi, where an average room is $62. Rate calculations were taken for two blocks of time, August 1 to August 10 of this year and February 1 to February 10, 2015, to account for holiday, promotion and convention-related pricing, the report said.