Some cities that require people own guns
UPDATE: N. W. Clayton informs me that "the Utah courts struck down the Town of Virgin's ordinance requiring residents to own guns shortly after it was enacted, due to the ordinance's violation of Utah's pre-emption law, which prohibits state and local government entities from enacting any firearms regulations without explicit authorization from the State Legislature. Ironically, this law was passed in the 1990s to prevent local governments from creating a checkerboard of gun-control statutes, but it applies to all firearms regulations, including regulations that require residents to own firearms."
He also pointed out: "On another matter, you may be interested to know that the Utah Legislature defeated a bill last week that would have prohibited firearms in faculty and staff offices at state-run colleges and universities. The University of Utah (also known as "the U", where I went to graduate school), after having seen the Utah Supreme Court declare the U's campus-wide gun ban to be illegal, begged the Legislature to grant individual faculty and staff members the authority to declare their offices "gun free". Under the proposal, if a concealed-weapon permit holder wanted to enter a "gun free" office, he would have to remove his weapon first. The bill required the university to install a storage locker somewhere in the vicinity of a "gun free" office, though this requirement had no enforcement clause and would likely have been ignored. A permit holder who entered a "gun free" office with his weapon would have been guilty of a criminal offense. If this bill had passed and I had gone to the U to speak with a professor who had a "gun free" office, and if no lockers were provided, I would have simply unholstered my loaded weapon and set it on the floor outside the office.
The bill did not address the issue of shared offices or office spaces with cubicles, both of which are common at universities. Also, even if lockers had been installed, I can imagine people freaking out when they saw someone unholstering and unloading a firearm in broad daylight. Furthermore, this would have defeated one of the purposes of concealed carry, which is to keep people from knowing who's armed and who isn't. The list of concealed-weapon permit holders is supposed to be kept confidential under state law, but this bill would have been a de facto way of forcing permit holders to declare themselves in public.
The substitute version of the bill that passed merely allows students in campus housing at state colleges and universities to request assignment to a roommate who does not have a CCW permit, though there is no requirement that that such a roommate assignment be guaranteed. Given that the list of permit holders is secret, and given that the U is prohibited from requiring students to declare whether they have a permit, I'm not sure how this will work out."