You want to shoot indoors at night? Or you want to shoot outdoors at night? If you want to shoot outdoors at night, go to places with moving objects and pretty lights. Such as highways, buildings, harbours, city scapes, star trails, or go shoot long exposure shots at sunset and sundown of streams, waterfalls, seascapes, etc.

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Study  "The blue hour". Photos from that period can be very beautiful, and certainly stockworthy.
This is not, but it is the blue hour and you can see what happens.