Description matches, nothing in the article on whether it occurred under a TV set. Matches all other MOs but I suppose it could be a coincidence.
http://patch.com/virginia/reston/police-stabbing-clydes-reston-during-halloween-party-0
A stabbing occurred at Clyde’s restaurant in the Reston Town Center during a Halloween party event at the restaurant.
The victim, a 24-year old man from Vienna, VA, was airlifted to a hospital after being stabbed on Sunday morning, November 1, 2015 at about 1:21 a.m., according to Fairfax County Police Department (FCPD) spokesperson Officer Don Gutthardt.
According to Gutthardt, it appears that there was one victim. His condition is “non life threatening.”
The suspect has been described as an Hispanic man. He was wearing a dark jacket, jeans and a white shirt.
According to a police announcement, the victim and his 26-year-old girlfriend were at the bar when an unknown man approached and started to “flirt” with the girlfriend. A verbal argument began between the boyfriend and the unknown man and it escalated into a physical altercation.
The suspect produced a knife and allegedly cut the boyfriend and then fled.