Mac and Charlie: White Trash - S6-E5
Continuity mistake: When trying to get into the club pool, Mac takes two beers from the 6-pack that are from the same side, so that the remaining beers are in a 3 x 1 configuration. Later, you see on the table and when they're walking away, the missing beers came from the front so the remaining beers are in a 2 x 2 configuration.