cloudM rooftop bar at citizenM Paris Gare de Lyon is open every day from 6.30 PM to 1.00 AM.
These opening hours are no accident (neither is the placement of the bar on the 16th floor for the best views possible). There's nothing better than watching the dusk approach, and the city lights twinkling into life while the sun sets over Paris. You'll watch the Seine and its boats flow right by, and Eiffel Tower shine and light up the sky. Of course, a cocktail in your hand makes the whole experience even better.