Are there any banquet halls in metro detroit area where you can bring your own food and alcohol?

Try the fraternal order op police in warren on 14 mile between VanDyke & Hoover.

All you need to do is make a phone call.

Most halls have catering optional, You must make those arrangements.

Try asking at union halls or at groups such as the VFW, American Legion, and the Fraternal Order of Eagles.