In Erf, Dance-Fighting is a leadership mechanic used in combat to add a significant attack bonus to a stack of units. While it is clear most factions know of dance-fighting and can use the skill, the exact mechanics of the effect have yet to be explained in the comic.
Knights In Stanley's Service - The Knights in Stanley's Service, populated by elite Hobgobwins, are led by Lord Stanley The Tool himself. They adopt black leather 'armor' and warpaint, wield axes, and generally have a Heavy Metal Appearance.Erf-b1-p076
Wanda Firebaugh - This dance-fight was impromptu and planned by 'Lord Hamster' after learning that the Royal Crown Coalition had no dance-fight leaders (that he knew ofErf-b1-p128), and that a Master-Class Croakamancer could achieve a 'dance-fight' bonus using Uncroaked. Wanda led an army of several thousand Uncroaked in a rather thrilling push against Ansom's forcesErf-b1-p127 Erf-b1-p129
The units that are to receive the dance-fight bonus must be wearing uniforms of a similar theme, and act 'in-time' with one another. It also appears that, to initiate a Dance-Fight bonus, the 'dancers' must have a leader; typically this role is filled by whomever is leading the stack. Once the Dance Fight has commenced, all of the units in the stack appear to gain significant combat prowess against non-dance-fighting units. If two factions pit dance-fighting stacks against one another, they are usually matched in power, if all other variables remain equal.
Real World References
Jillian dresses like Sandy from the musical Grease and when talking to AnsomErf-b1-p93 quotes "You're the one that I want" (a song sung by Olivia Newton-John and John Travolta in the film version). The original plan for Transylvito and Charlescomm to ambush and kill Stanley, as described by Vinnie to his DonErf-b1-p111, likewise shows the dance-fighting styled after Grease (rather than the Transylvito-only West Side Story dance that actually takes placeErf-b1-p123).
Lord Stanley's dance-fight style is inspired by the American Rock Band, Kiss. The 'Knights In Stanley's Service' (K.I.S.S.) are based on a) the Kiss Army, Kiss's massive fan-club, and b) an accusation that the band name KISS once stood for 'Knights in Satan's Service'. Stanley wears the face-paint of Kiss band-member Paul 'The Starchild' Stanley, as their names draw an obvious parallel. Stanley also quotes two Kiss songs as rallying cries against the Transylvito forcesErf-b1-p123: "Stand up! You don't have to be afraid!" with his Knights answering "I love it... Loud!" from the 1982 I Love It Loud; and "Your lightning's all I need" from the 1977 Shock Me. The quotations seem directed to the Arkenhammer itself, referring to its powers of thunder, lightning, and electric guitar.