It's Always Sunny in Philadelphia: Season 15, Episode 3

15 - 3: The Gang Buys a Roller Rink

It's the 90s, and the Gang hangs out one last time at the local roller rink before going their separate ways. An innocent young Dennis learns the horrifying details of Frank's business, a truly sweet Dee is excited to head off for Hollywood, while Charlie and Mac's jobs at the roller rink are in jeopardy, leaving them to figure out their next move.