Owners of a Wrigley Field rooftop club were sued by their lender after their businesses defaulted on four loans totaling $7.35 million, according to a complaint filed Wednesday in Cook County Circuit Court. R. Marc Hamid and Jeffrey Goby own Skybox on Sheffield, a rooftop business at 3627 N. Sheffield Ave. They also own Just Great Tickets, a Chicago-area ticket broker. Hamid declined to comment, and Goby could not be reached. In the lawsuit, MB Financial Bank alleges that their rooftop business has about $6 million outstanding on three loans. The largest loan went into default in September. Hamid, Goby and their ticket company guaranteed the loans, the complaint said. Hamid and Goby received loans in 2005, a year after the rooftop owners adjacent to Wrigley settled a lawsuit with the Chicago Cubs. The team had accused the rooftop owners of stealing their product by selling tickets on their rooftops. Under the settlement, the rooftop owners agreed to pay the Cubs 17 percent of their revenue for 20 years. After the settlement, many rooftop owners spent millions of dollars renovating their buildings to meet new city building codes for their businesses. MB Financial also named Hamid and Goby's rooftop business and JustGreatTickets.com Inc. as defendants. The lawsuit comes as the rooftop owners are trying to negotiate a new contract with the Cubs to let the team place advertising signs on their buildings. The Cubs are seeking to lift restrictions imposed by the landmark status on Wrigley Field that limit advertising in the ballpark. The team says it needs new advertising to help pay for a $300 million renovation of the 99-year-old stadium. The rooftop owners have raised concerns that new signs could potentially block their views of Wrigley Field and put them out of business.