[throwawaymlc]

All of the big firms in NYC already have their own heavily branded / promoted charity day / events / philanthropy programs - your own charitable contributions aren't going to be a selling point for them.

If you want do this for your own reasons, great, I am sure it could deliver a lot of meaning and satisfaction in a field where that is perhaps hard to come by.

(Shameless plug - I do happen to be on the job market in NYC now, if you wanted to connect or offer any advice I'd be receptive, email in my profile).