If you get fed up of looking for records there's some things that I'd recommend you check out:-
People Mover - an overhead train that takes you around Downtown Detroit, it costs about 50 cents, and you can stay on as long as you like. That's a good way to see Downtown first and then you can decide where you want to jump off. Tigers Baseball Stadium is a good stop off as there is also the Lions Football Stadium across the road
Detroit Riverwalk - A walkway of about 4 miles taking you along the waterfront passing a combination of things from beautiful yachts,speedboats, music arena, parkland areas, Detroit folk fishing (who were so friendly that I wanted cry ) the odd run down building (which all made for a great Detroit experience) to the new at the Renaissance Center. It is such a pretty walk especially on a lovely sunny day. I walked it on my own a couple of times, and it is very safe as they have patrolled security. Don't think I'd walk it at night time though as in any big City really.
It goes without saying that, for me, you have to visit the Motown Museum, if only the once (though I've done it a few times ) It may be a tad commercial, but the tingle you get when you're down in Studio A is simply awesome and well worth queuing up with the likes of Mr & Mrs Smith
Hope this info helps make your trip more enjoyable if you do decide to lift your nose from a record box
All the best
Ali x (The Ambassador for Detroit )