Okay, I followed the first link, there was one of the images, both the covered up and original version. Apparently they were hung up on one guy being held in bondage, white ropes and fancy knots. The censoring has to be because it was two guys, no women, on the cover, because this is Reno: there are probably show-girls wearing about the same amount of covering, and getting paid for it, not censored. And they're probably considered 'family-friendly' unless the kids are drinking or betting.
I hope that the RT Convention has told the Peppermill that they will not be back, the reviews will be bad, and then goes to the Reno Chamber of Commerce and suggests that the Convention, and all its members, could certainly find a better, more accommodating facility in some other city.
I could see the problem if this was Salt Lake City, or, I dunno, Boston, but Reno?