On the [http://www.theninhotline.net/nin_historian/tour_dates.html NIN Historian page] (from which all these dates originally came), the Nov. dates are all backed by an official NIN itinerary (the $ symbol notation). And, as I mentioned above, those Florida dates were just postponed because of the voice thing (and corroborated by the newspaper articles). In contrast, the December dates listed seem to be solely based on this [https://groups.google.com/d/msg/alt.music.nin/Aaf3IXHWfP0/MFzZuBOMQTwJ one hazy recollection]. Although she seems pretty sure of the Dec. 6 Orlando date, all the rest of the post is super-sketchy. I think she may just be mis-remembering the Nov. dates.
Update: m0reta confirmed that her memory was hazy, and that the Dec. Florida dates were, in fact, the Nov. dates. [https://www.echoingthesound.org/community/threads/733-Random-NIN-Questions?p=447087#post447087] [[User:Tabanger|Tabanger]] ([[User talk:Tabanger|talk]]) 11:46, 2 February 2019 (PST)
So I'm starting to be of the opinion that the Dec. FL dates, more likely than not, did not happen. I went looking for some evidence in the Palm Beach Post, and they [https://www.newspapers.com/search/#lnd=1&query=nine+inch+nails&dr_year=1995-1995&t=4012 covered NIN pretty extensively in 1995], but not a single mention of a club show in West Palm Beach in Dec.
[[User:Tabanger|Tabanger]] ([[User talk:Tabanger|talk]]) 09:15, 3 December 2016 (PST)
Update: m0reta confirmed that her memory was hazy, and that the Dec. Florida dates were, in fact, the Nov. dates. [https://www.echoingthesound.org/community/threads/733-Random-NIN-Questions?p=447087#post447087] [[User:Tabanger|Tabanger]] ([[User talk:Tabanger|talk]]) 11:46, 2 February 2019 (PST)