Same situation where I live, a mile or so from the U.N...... or anywhere in the New York city area, for that matter. I have a pleasant sounding bell for low speed non-emergency situations & a louder horn for emergencies. I thank the party(ies) for their courtesy as I pass..... haven't encountered a rude response yet (not that I've noticed, anyway), not that it would deter me from practicing what I consider to be safe cycling if I did.