There are many wonderful leisure activities to do in this part of southwest MI. You can check out some of the local events at The Greater Dowagiac Chamber of Commerce. If you're here for the water and need a boat you can try either of these guys Midway Watersports (269)424-6177 or Lake Effect Power Sports (269)944-5577. If you want a boat that's a little more casual you can call Doe-Wah-Jack Canoe Rentals (269)782-7410 or email them at qtm.net/~dcri.
For those that want to keep their feet on terra firma there are some great local wineries you can find using these great links Fruitful Vine Tours, or http://www.frontstreetwines.com/. For those of you that love to golf check here for the closest golf courses golflink.com.
There are many local restaurants, some real good and some real interesting (it's up to you to decide which one is which) including Timberline Inn (fine restaurant & bar area), Irish Spartan's Sports Bar, Zekes, and Wick's Apple House.