Generate a question about the following movie plot: Wilee (Joseph Gordon-Levitt) is a New York City bicycle messenger alongside his ex-girlfriend, Vanessa (Dania Ramirez). Her roommate, Nima (Jamie Chung), delivers $50,000 that she has saved for two years to Mr. Leung (Henry O), a Chinese hawaladar, in exchange for a token (a used movie ticket stub, on which is drawn a smiley face) that she must deliver to a 'snakehead' named Sister Chen, buying a place for Nima's son and mother in one of Sister Chen's ships that smuggle people from China to the United States.Mr. Lin, a local loan shark, runs a gambling establishment frequented by Bobby Monday (Michael Shannon), a gambling-addicted NYPD officer who owes him $17,000. Mr. Lin's floor manager, whose sister works for Sister Chen, has learned about the ticket and approaches Monday, offering to clear Monday's debt if Monday gets him the ticket. Monday begins searching for Nima, who notices Monday shadowing her, and decides to hire Wilee to deliver the envelope with the ticket to Sister Chen at 7 P.M. After Wilee leaves, Nima is confronted by Monday, who roughhouses her until her hand crumples the delivery receipt. Monday hears the sound, takes the receipt and learns about Wilee. After Monday leaves, Vanessa finds Nima, and learns the contents of the envelope.Monday catches up with Wilee before he leaves the campus where Nima lives and threatens him for the ticket. Wilee escapes and heads to the police station to report Monday, only to find out he's a police officer, and hides in the bathroom, where he opens the envelope and finds the ticket.After he escapes the station, Wilee angrily tells his dispatcher, Raj (Aasif Mandvi), that he is returning the package so that someone else can drop it off. Returning to Nima's college, Wilee leaves the envelope, which is picked up by his rival, Manny (Wole Parks). Before Manny picks it up, however, Monday calls the dispatch to redirect the delivery to a different address.As he is about to leave the college after returning the envelope, Wilee runs into Nima. He confronts her...
Answer:
Who runs a gambling establishment?