Newars aren't only from Kathmandu, they can be from Patan area or Bhaktapur or from outside valley. Depending on where they come from, their culture can be different. But, one thing for sure, no matter where they originally are from, they love to eat, drink and party! Come to Jackson Heights in Queens, NY and try out Samaya Baji. This is one of the typical newari cuisine. I'm sure there are a few Nepalese restaurants in VA too. During Tihar, there are several Nepalese gatherings in NY/MA for Mha Puja where you can get some flavor of Newariness. Just google and enjoy!