Union Square in New York City has nice little cafe tables where you can set up for night sketching. Here's one I did last night.
The view is looking west toward the subway stop and the coffee shop.

I'm using a
Petzl E91 PL Tikkina 2 Headlamp
which has two LED light bulbs, two brightness settings, and an adjustable angle feature, so that you can aim it where you want it. (Thanks, Frank!)