I am staying there on a business trip in a few weeks and wanted to know if anyone has experience in picking up a female companion at this place?  Are there working girls hanging in teh casino and bar like in Vegas...or is call-in the only way to go? Suggestions would be appreciated.

I've been to a lot of Casinos in Michigan, and I've never seen anyone who looked like a working girl hanging out in the bar areas.

I think you'd be much better off just arranging for someone to come and visit you. Your chances of anything else happening are going to be really hit and miss...