The Food Network set up shop at Bar + Bistro in the Arts Factory Feb. 9-11 for its upcoming series Restaurant Stakeout. The pilot will premiere March 1 and feature the Sahara location of Firefly, too, along with four New York restos. … Jenni “JWoww” Farley was at Gallery Feb. 10 to celebrate her 26th birthday along with boyfriend Roger Mayweather. She said that even though Hoboken wouldn’t let the spin-off series she’s doing with Nicole “Snooki” Polizzi film there, they found a place to use in Jersey City and the show will go on. Thank Sweet Guido Jesus. … UFC fighter Nick Diaz tested positive for marijuana following his Feb. 4 fight with Carlos Condit. Which does explain why he stopped in the middle of the fight and just looked at his hands for four rounds.