It's Always Sunny in Philadelphia

The series follows "The Gang", a group of five depraved underachievers: twins Dennis Reynolds and Deandra "Sweet Dee" Reynolds; their friends Charlie Kelly, Ronald "Mac" McDonald, and, from season 2 onward, Frank Reynolds, the man who raised Dennis and Dee. The Gang runs the dilapidated Paddy's Pub, an Irish bar in South Philadelphia.

Each member of the gang shows varying degrees of dishonesty, egotism, selfishness, greed, pettiness, ignorance, laziness and unethical behavior, and they are often engaged in controversial activities. Episodes usually find them hatching elaborate schemes, conspiring against one another and others for personal gain, vengeance, or simply for the entertainment of watching one another's downfall. They habitually inflict mental, emotional and physical pain. They regularly use blackmail to manipulate one another and others outside of the group. (source: en.wikipedia.org)