It's Always Sunny in Philadelphia Season 6 Episode 3
The Gang Buys a Boat
The gang pools together money they earned from Dick Towel and buys a boat, but all for different, conflicting reasons. Dennis and Mac want the boat for partying, while Charlie wants the boat for shrimping. Mac ends up becoming the captain and assigned Dee, Frank and Charlie to the hard labor of cleaning off the barnacles and the inside of the boat, while Dennis and Mac go off looking to socialize with the other boaters. Dennis and Mac end up on a yacht party and bring back two girls to the boa... but it's too late, the rest of the gang accidentally set the boat on fire.