Cirque du Soleil has mounted no less than eight ongoing shows in Las Vegas at once, each at a different casino, as of 2010. How? While Mystere, the first, is basically a touring show taking advantage of a fixed abode, most of the other shows put a twist on their style:
"O" uses a giant pool for its stage, so all the acts incorporate water in some way (i.e. diving and synchronized swimming).
Zumanity is adults-only.
KA has a linear plotline told through its acts, plus two moving stages to create its settings.
LOVE is themed around the music of The Beatles; there's more dance than usual, too.
Criss Angel BeLIEve was initially a magic show/circus hybrid where the troupe played a supporting role to Criss Angel, but after a Retool it's a conventional magic show with some Cirque filigree.
Animal Crackers, in a sequence absent from the movie version, has a scene in the second act that changes the time and place to Ancien Régime France, with Spaulding as Louis XV, Mrs. Rittenhouse as the Queen, Mrs. Whitehead as Du Barry, and John as the great painter Monsieur Jean Jacques Beaugard.
''Tachyon Drift - the episode where the ship forces everyone to speak in Norwegian, to make Doctor Jensen feel more included.