Here is the actual law concerning places it is illegal to carry concealed in Michigan. Please note the part I put in bold.
Michigan Legislature - Section 28.425o
FIREARMS (EXCERPT)
Act 372 of 1927
28.425o Premises on which carrying concealed weapon or portable device that uses electro-muscular disruption technology prohibited; “premises” defined; exceptions to subsections (1) and (2); violation; penalties.
Sec. 5o.
(1) Subject to subsection (5), an individual licensed under this act to carry a concealed pistol, or who is exempt from licensure under section 12a(h), shall not carry a concealed pistol on the premises of any of the following:
(a) A school or school property except that a parent or legal guardian of a student of the school is not precluded from carrying a concealed pistol while in a vehicle on school property, if he or she is dropping the student off at the school or picking up the student from the school. As used in this section, "school" and "school property" mean those terms as defined in section 237a of the Michigan penal code, 1931 PA 328, MCL 750.237a.
(b) A public or private child care center or day care center, public or private child caring institution, or public or private child placing agency.
(c) A sports arena or stadium.
(d) A bar or tavern licensed under the Michigan liquor control code of 1998, 1998 PA 58, MCL 436.1101 to 436.2303, where the primary source of income of the business is the sale of alcoholic liquor by the glass and consumed on the premises. This subdivision does not apply to an owner or employee of the business. The Michigan liquor control commission shall develop and make available to holders of licenses under the Michigan liquor control code of 1998, 1998 PA 58, MCL 436.1101 to 436.2303, an appropriate sign stating that "This establishment prohibits patrons from carrying concealed weapons". The owner or operator of an establishment licensed under the Michigan liquor control code of 1998, 1998 PA 58, MCL 436.1101 to 436.2303, may post the sign developed under this subdivision.
(e) Any property or facility owned or operated by a church, synagogue, mosque, temple, or other place of worship, unless the presiding official or officials of the church, synagogue, mosque, temple, or other place of worship permit the carrying of concealed pistol on that property or facility.
(f) An entertainment facility with a seating capacity of 2,500 or more individuals that the individual knows or should know has a seating capacity of 2,500 or more individuals or that has a sign above each public entrance stating in letters not less than 1-inch high a seating capacity of 2,500 or more individuals.
(g) A hospital.
(h) A dormitory or classroom of a community college, college, or university.
(2) Subject to subsection (5), an individual shall not carry a portable device that uses electro-muscular disruption technology on any of the premises described in subsection (1).
(3) An individual licensed under this act to carry a concealed pistol, or who is exempt from licensure under section 12a(h), shall not carry a concealed pistol in violation of R 432.1212 of the Michigan Administrative Code promulgated under the Michigan gaming control and revenue act, 1996 IL 1, MCL 432.201 to 432.226.
(4) As used in subsection (1), "premises" does not include parking areas of the places identified under subsection (1).
-snip-
May I strongly, very strongly!!!, suggest everyone research the actual laws (ALL the laws including trespass laws! perhaps even spending a bit of money talking to an attorney) that apply to carrying a gun in the State you live in and any States you might visit.
The following are my unasked for and likely annoying opinions:
Sneaking a gun in where it is illegal isn't fighting against gun laws with personal time and money spent getting laws changed but is nothing more than... sneaking. Sneaking that won't further any efforts to get laws changed but will end up being used to strengthen the anti gun argument for even more anti gun laws.
Respect, or the lack of it, is a two way street. I cannot understand why anyone would demand that their right to bear arms be respected while disrespecting someone else's private property right to ban guns from property they own. Not to mention it makes no sense to increase the profits of an anti gun business helping that anti gunner open yet another anti gun business while spending YOUR money on politicians who are working for even more gun control laws.