Yes for me, I'd pay a dollar. Given the current biohazardous toxic waste dumps NY considers public toilets I'd gladly pay to use one not inhabited by a junkie or caringly decorated with human waste and used needles.
Unfortunaly I have to go to downtown a couple times a year for work.
The smell on NY streets in the summertime is overwhelming. I can't imagine people relieving themselves around the corner of every alley could possibly make it smell any worse than the mountains of rotting garbage left on every residential street for a week in the hot sun.