Housing Works is a totally rad organization that supports those living with or affected by AIDS in NYC. In order to fund the services they provide, Housing Works runs thrift stores and a bookstore cafe. I have been volunteering at the bookstore since the summer and it has been a lot of fun.
Learn more here: http://housingworks.org/
Come support HW at these events: http://housingworks.org/events/category/bookstore-cafe-events