My girlfriend and I along with another couple will be in Detroit for four days the end of this month for Autorama at Cobo Hall. My friend's wife will be celebrating her birthday that weekend and he wants to send her to a spa one of those days. I figured my girlfriend will want to go as well. They won't be driving so it has to be somewhere in the people mover loop. Are there any spas downtown? If so, anybody have a recommendation?