http://www.gdba.com/is the link to the former Greater Detroit Bowling Association, now the Metro Detroit United States Bowling Congress. Nothing has been updated at this site in a long time. You are better off going to the MDUSBC site at: http://www.mdusbc.com/
Great Lakes Senior Bowling Assoc This is, as the name implies, a group for Senior Bowlers for Tournament info. They were supposed to host a tournament here in 2005, but cancelled without notice, so I can't say too much about them.
http://www.mibowl.net/ is the link to get you to the Bowling Centers Associatio of Michigan (BCAM). BCAM presently consists of 198 of the most progressive bowling centers in the state of Michigan. If it isn't here, it isn't in Michigan!
To get to the Bowling Proprietors Association of America, go to www.bpaa.com. This is the website of the bowling center owners and has lots of stuff on it, too.,