Kendall Jenner Hey Justin ... I'm ALSO Friends With NYPD Cops

2/15/2015 7:38 AM PST

Justin Bieber ain't the only celeb making friends with the NYPD ... his buddy Kendall Jenner is also getting chummy with the boys (and ladies) in blue.

Kendall posed for pics with a group of officers Saturday night outside the Book Marc Bookstore in New York ... just a day after Justin foot the dinner bill for a group of NYPD officers.

Justin and Kendall have been hanging out together lately.  So, we ask, is she gonna kick anyone's ass at ping pong now?