I just posted on another thread about how I love live music outdoors in the Summer Time. The Detroit area is a great place for that with a number of outdoor concert venues and several outdoor festivals throughout the summer (culminating in my favorite the Detroit Jazz Festival).
My favorite venue of them all has to be Detroit's Chene Park. Situated right on the Detroit River Front, just a mile or two from downtown, Chene Park is an excellent venue for R&B and contemporary Jazz (with a little hip hop thrown in for good measure) throughout the summer with concerts on Wednesday nights and the weekends all summer long. I've seen several great shows and acts there over the years and continue to enjoy going there. If you're ever in the Detroit area in the Summertime, you'd be doing yourself a big favor to check out a show there. Check it out:http://cheneparkdetroit.com/events-and-pricing/