It is on 24th Street right next to Taco Bell across the street from the stadium.
From your hotel Get on I-94 (south or west)* and go a short way to the Lapeer St exit (opposite direction of Meijer and the Mall). Turn left on Lapeer and go to 24th St. You can only turn right there and it will be on your right.
You can often find some good things there. Good luck
*At different places on I-94 you are going North/South or East/West. Mostly it is an East/West road so that is what the signs say - the compass in your vehicle will report differently.