I've been wondering the same thing for a while. The updated versions in the main download still have the glitch.

I suspect that the objects running these NPCs are dressing them in light skin and mullets. Fire Dancers, Food Stand attendants, and DJs on which I used the clone function in TS2 Enhancer to change their appearance continued to use the same outfit/hair regardless of the actual outfit defined in the character file. The mat is telling the dancer to dress in the light skinned version.  Anytime you summon a dancer or attendant to a lot without their object they just stand there, as mentioned above, so I suspect these NPCs are almost entirely object driven. I would say, we can fix this by editing the code in the Bon Voyage/Nightlife objects based on the Apartment Life objects. The 50s hot dog stand from AL is just like the BV ones but allows for multiple skintones, the same is true for the break dancing mat/fire dancer mat.