One of the bright spots in San Francisco at night is Coit Tower. It isn’t super tall, but going along the water front, you can’t miss it. It is a tourist attraction. During day time, it is a NIGHTMARE to go there.
There aren’t many parking spots at Coit Tower and there is a line going to Coit Tower and people waiting for people to leave.
Best thing to do is park someplace below Coit Tower (preferably on the east) and go up Filbert Steps or Greenwich Steps.
To go up Coit Tower, it is usually $6 to $9 depending on resident or non resident and then you get a 30 degree view of SF.
I usually take people at night because there are no crowds and some people hanging around. While going up will be closed, The Tower lit up is gorgeous, especially if there is a theme.