Nothing, nota, etc. Everyone's golfing in the summer more or less. There's a regional coming up at Sunnybrook Lanes in the summer but it's not big money. But the ego players won't be there since they can't throw it right and watch it bounce back. So other then the Michigan Majors, there's really no other tournaments going on.

Hamtramck singles at Hazel park bowl, every weekend, handicap and actual divisions

Hamtramck Singles Classic:  http://www.hamtram.com/

Tournament Organization Links:  

http://www.michiganbowling.com/Tournaments/MichiganTournamentOrganizations.htm