And thats the crux of it: Catholic raised Michael would see any such club as an extreme of sin, while White Court raised Thomas in on the other extreme of the spectrum, and by his families standards it is just another fetish club (if an exclusive one). I dont think there would be any "misrepresenting", just differing definitions and/or degrees of familiarity.
An exclusive fetish club is pretty far from what anyone would consider a "gentleman's club," even the White Court's. It just doesn't fit what you would describe as one, and besides, Thomas's family's standards aren't really his standards. Also, it just doesn't make sense for Thomas to bring Michael to Club Zero. He's trying to stay on Michael's good side, or at least on his 'don't smite me' side--bringing Michael into what is basically a feeding ground for the White Court is just a bad idea.
The only reason I would say it might be Club Zero is because you are otherwise granting what appears to be a *lot* of power to White Court vampire. Consider that every major city has numerous "houses of sin", and for a White Court vampire to be able to detect a portal to any of those means practically instant transportation to any city in the world -- *way* better than anything the White Council apparently has.
Thomas says he can cross over into places close to
his heart, and Harry says he can find the Deeps because of what happened to Thomas personally. So, presumably, he is limited to strip clubs and such that he has personally been to and is associated with.
Also, yeah, what Quantus said--it's not instant, Thomas still has to walk from place to place in the Nevernever.