Here are a few I know of:
Thursday Nights Downtown Wyandotte at the Pennsault Club.

Friday Nights:
Sears in Lincoln Park
50's McDonald's on Telegraph in Dearborn/Dearborn Heights

Then there is the shows:

Eyes On design: Every Father's Day. This year June 17th.
http://www.eyeson.org/html/evn_eod.htm Best show I ever go to.

I went to the St. Ignace show last year, it fell on our fishing trip to the UP and we got up there early so our cabin was not ready. We ended up hitting this show and was only able to see 1/2 of it because it was so big.
June 28-30, 2007
32nd Annual St. Ignace Car Show Weekend
June 28 - Kewadin Casino Cruise Night

June 29 - 26th Annual Down Memory Lane Parade, 7:00 p.m.

June 30 - Vehicles on Display





This well known St. Ignace Car Show© was formed in 1975 and the first show was held the last Saturday of June 1976. 134 vehicles were on display that year. The show continued to grow each and every year and by 2004, 2500 collector vehicles were on display with 100,000 spectators observing.