Queer as Folk

The series follows the lives of five gay men living in Pittsburgh, Pennsylvania: Brian, Justin, Michael, Emmett, Ted; a lesbian couple, Lindsay and Melanie; and Michael's mother Debbie. Another main character, Ben, was added in the second season. Due to tax incentives, the series was filmed in Canada, with frequent location filming in Toronto's Church and Wellesley gay village.

Source: Wikipedia.org