Twenty Third Bar
Not open-air: a glass-walled bar on the 23rd floor of Hotel Okura, the highest bar in central Amsterdam. Smart-casual, no DJ, and it shares the floor with Ciel Bleu.
Where to stay nearby: Pulitzer AmsterdamQuiet time
Weekday early evenings.
Crowd hack
It's quieter than the open-air rooftops in summer and works year-round, which matters in Amsterdam.
Insider tip
Come for sunset in winter, when it's around 4:30pm and the city lights come on below you.