I'm planning on putting on a bear costume (eg child friendly look) and stand in the street (UES) to promote my business through brochures.

Are there any laws in new york city banning this?

I don't know the answer, but wouldn't you feel more comfortable asking a lawyer instead of trusting answers from a public forum?

If you do this, first of all, best of luck to you in your venture. Second, please don't block pedestrian traffic on the UES, the streets are much too congested already. Thanks!