I am planning a biz trip to Mpls in mid-Jan.  I plan to stay downtown.  What hotels are friendly to the hobby re security, access, etc and yet offer a decent quality accommodation?  Thanks for your recommendations.  You can PM me if that is a better way to respond.  Thanks.

Openly friendly to break the law I doubt it but you can definitely get laid in any of those 4 stars hotels in downtown with no issues. Everybody has done it and will continue to do it. I have sampled the Marquette Hotel, The Grand Hotel,
Millennium, Radisson Plaza, Hilton and Crowne plaza.

Thanks for the comments, put down aside, I appreciate the mention of places to stay.  You added "Openly" to the response which was unecessary.
Thanks too to the hobbyists that PM'd me.