There many places to network with German speaking academics in NYC.
For example:
GDCH Stammtisch: German speaking chemists and other scientists (biologists, MD's ...) meet 4-6/year in a restaurant and network. If you would like to join the next event, send an email to GDCh.NYNJ@gmail.com (GDCh = Gesellschaft Deutscher Chemiker)
Enjoy a stimulating church service in Deutsch (every Sun, 10.30am) and subsequent "Kaffee und Kuchen" at St Pauls (Manhattan/Chelsea).
Join the events at the German Center for Research & Innovation.