It is possible to make your character dance using the /dance command. This dance loops infinitely until you perform another action.
Each class has its own dance, with most of them having references from popular real life dances. Not only that, a specific type ally has its own dance too.
As stated by a developer on the forums, Ice Sage, Fae Trickster, and Shadow Hunter have no specific dance reference while Candy Barbarian's general idea was "awkward man on the dance floor".
Class[]
Knight: City of Heroes (/boombox)
Gunslinger: The Running Man
Fae Trickster: Rush Hour car dance
Dracolyte: Carlton Dance - The Fresh Prince of Bell Air
Dracolyte (Avatar of Flame): Gangnam Style - Psy
Neon Ninja: Drop it like it's hot - Snoop Dogg
Candy Barbarian: "Shepard Shuffle" - Mass Effect series
Ice Sage: The Hoola hoop
Shadow Hunter: ?
Pirate Captain: ??
Boomeranger: Dancing Bug - Adventure Time
Tomb Raiser: Cybergoth Dance Party
Lunar Lancer: KXVO Pumpkin Dance
Revenant: ??
Chloromancer: Sprinkler
Dino Tamer: Clapping the the beat
Vanguardian: Light Balance Dance