One rumour that keeps going around the Hypergrid is that Áine Caoimhe has released a Clubmaster Dance Machine v2.2 at some point in the past.
I myself got my hands on three "v2.2" Clubmasters:
And I took myself some time and compared all three with an official v2.1 Clubmaster.
First of all, none of the three look like an official Clubmaster. The Sex Edition is of course red, the (2019) is teal as I've already said, and what's being offered as an official v2.2 is a disco ball hanging down from a cable. I thought that people had messed with all three, and it could be possible to reconstruct the closest thing to a vanilla v2.2 by looking at the differences, merging changes in the newer controller scripts that must have obviously been done by Áime into the 2.1 controller script and finally putting everything that looks official into a golden v2.1 Clubmaster.
So the first thing that struck me was that there is no v2.2 dance controller script. The version number of the controller scripts in all three "v2.2" Clubmasters is still v2.1.
In fact, the controller script in the disco ball offered as official is vanilla except for one difference that marks it unofficial: The dance machine identifies itself as a "Speakeasy Dance Machine" rather than a "Clubmaster Dance Machine". The one in the teal (2019) variant had some colours changed, the NPC dancers were renamed from "Dance Partner" to "Kroatan Dancer" which means that this is a dance machine customised for the now-defunct Kroatan Grid, and the entire Matchmaker code was removed. If the latter had been an official change, the readme notecard would have been updated accordingly, but it wasn't. Finally, the controller script in the Sex Edition is a 100% vanilla v2.1 controller script.
As for the already mentioned readme notecard, it's identical in all four dance machines.
So, except for the aforementioned edits in the controller scripts, are there any other differences?
Well, I guess the differences in the Sex Edition should be clear, given its purpose. New animations including 18 new sets of couple animations in two categories, new nude NPCs.
The "Speakeasy" disco ball has 18 new solo animations, three of which have their own category while the other 15 are squeezed into a fourth inspite of there only being nine buttons available. The NPCs remain unchanged.
The (2019) variant has the same set of animations, but the NPCs were all replaced.
So here's my verdict:
If you're looking for an official, vanilla Clubmaster, get yourself a v2.1. v2.0 is outdated, and all v2.2 are third-party mods.