Long-time viewers of DWTS may have noticed that Lindy Hop and Argentine Tango are quite different from any of the dance styles previously featured. These dances are taught in the DVIDA Nightclub syllabus, as well as in club and competition circuits. They are both exciting to watch in competition or show formats, because both offer opportunities for very inventive choreography which anyone can enjoy, not just ballroom buffs.
Neither dance features a typical latin or ballroom frame. In the latin frame, the partners are directly in front of each other in closed position. In the ballroom frame, the partners are slightly offset, in a right-side to right-side position, and looking over each others' right shoulders.
The third most familiar frame is the "swing" frame, which you see in East Coast Swing and in Jive, in which the partners have a more relaxed position and are in a slight "V" shape. Lindy Hop takes this position occasionally, but the overall body position and poise of Lindy Hop are not like ECS or Jive, which are more upright - and which, it should be noted, are danced in regular ballroom shoes. If you look at the footage from Lindy Groove in Pasadena, you'll see most of those Lindy swingers are in sneakers. This makes it a lot safer, not to mention more comfortable, when moving at those speeds and when attempting aerials, throws, or other tricks.
Lindy basic is an eight-count swing (rock step - triple step - rock step - triple step) and is a very old style, dating back to the 20s and 30s in Harlem nightclubs. The basic figures include synchronized kicks, turning triples, and traveling walks, and are danced today much as they were then.
Argentine Tango is of a similar vintage and has evolved considerably. A "proto-tango" style, featuring simple walking actions in a very close embrace, is still done today; but many American students who come to Argentine Tango are inspired by the spectacular footwork (hooks, floor sweeps, and interlocking actions) and gymnastic tricks that can be see in tango stage shows.
In real-life ballroom competitions, lifts are only allowed in "show dance," cabaret, or theatre-arts divisions. However, embellishments - particularly foot and leg stylings - are permitted in all divisions, as long as the integrity of the dance remains intact. For example, in International Standard (waltz, tango, foxtrot, quickstep, and Viennese waltz) the partners must remain in closed position. Their stylings must work within that limitation. Argentine Tango embellishments are showing up in ballroom tango, in all the latin dances, in salsa, and even in hustle and West Coast Swing.
It is generally advisable for dance students to master basic technique before adding any adornments, as it is all too possible to do an adornment so habitually that it becomes part of a basic step and ceases to have any meaning. Adornments, embellishments, accents, or styling - whatever you wish to call them, "fancy" actions should always be applied with intention.