Never postpone your location sketches, because you never know when a landmark will be gone. Watching the news tonight about the fire that is overtaking the old Masonic temple on East 55th reminds me of the times I've driven by it, and had wanted to draw it. There was something that had appealed to me about it, but I put it off. I liked the 3 arches on the front, which might have been windows at one time but currently held signage.
I'll do it some other time. Not now. I'd thought.
If you want to draw something, don't wait.