Try to find access to a rooftop at night and picnic up there at night, and bring candles for romance.
This date idea is not only unique, but can be very romantic.
If you have access to a building rooftop in the evening, take your date up to the top with a blanket, picnic basket, and candles (don’t forget the matches) and enjoy each other’s company.
Savor the moment you have to escape from all the hustle and bustle from the street below.
The taller the building the better (assuming you are not afraid of heights) the higher you go up, the more stars you will be able to see in the night sky above you.