on late arrival, expect basics to be in order, including heating / air conditioning. Air con / heating did not work, only the fan function. Past midnight I spent 60 minutes experimenting , instead of winding down. There was a portable oil heater, that did heat, but required experimentation to calibrate (room too cold then too hot etc). I didn’t ask for a refund, not worth the bother. But Cosmopolitan Hotel was just neglectful: fix the central heating or AT LEAST take care to advise guests it is broken and how to operate its backup device AND offer a discount for the inconvenie and interruption to the Rest which is what we pay for.