triple triptych

Can you plot the locations of each of these threesomes on a map of Manhattan?

Hint: If you draw lines connecting the three location points, you'll end up with a very long, narrow scalene triangle with the longest side on the right. Fun, huh?

First responder to email me with an answer (undoubtedly clever, perhaps correct, but not necessarily both) identifying the three locations will receive something nice and New Yorkish (I won't send gefilte fish through the mails - promise) via United States
Postal Service. From me to you.

e address = dianamusemail [at] gmail [dot] com

:217project no. 18; images dianamuse