Gossip Girl Season 4 Episode 9: "The Witches of Bushwick"
Chuck hosts a "Saints and Sinners" masquerade party at the Empire. Dan and Nate don't know what to make of Serena's mixed messages. Blair sets her sights on becoming the new face of Anne Archibald's foundation for girls, but Anne is concerned about Blair's relationship with Chuck.
Hey Serena, it's me. I saw your thing in The Post. Just wanted you to know that Brooklyn is a great place to avoid nasty looks. Unless you throw your recycling in the regular trash or try to open a chain store with questionable labor practices.
Serena: Hey, why are you guys eating? I thought we were going to Sarabeth's. Eric: Ah, we decided we could spread out better here. There's more room to work. Serena: On what, your calculus homework? Eric: Your love life. It's a little something called "Dan vs. Nate". We're here to help. Elliot: And we brought protractors.