Change Group in New York: Does Not Exist; Headquarters in Stamford, CT

There is no "Change Group New York" entity. The foreign exchange company ChangeGroup operates in the US as ChangeGroup USA, headquartered at:

ChangeGroup USA, Inc.
100 First Stamford Place, 1st Floor
Stamford, CT 06902, USA

They provide currency exchange services at airport locations (JFK, Newark, Logan, etc.) and partner with banks/retailers. For NYC locations, check their website's location finder or visit airport terminals.