Here you go Hilton.........in other words don't worry about it unless you are "grossly negligent".
"Michigan's dram shop law applies only to alcohol vendors -- that means bars, restaurants, shops, and other sellers. The law does not allow an injured person to bring a civil lawsuit against a social host who provides alcohol to someone who goes on to cause an alcohol-related accident.
For example, suppose that instead of going to Brandon's Bar, Dot goes to a party hosted by her neighbor, Harvey. Harvey provides an open bar and Dot has several drinks. Eventually, Dot heads out onto the back deck to dance. She collides with Petra and both women fall off the deck, suffering injuries.
Unlike in the bar, here Petra may not file a lawsuit against Harvey for providing the alcohol -- whether or not Dot is a minor. (However, both Petra and Dot may have a premises liability claim against Harvey if they fell because the deck was in an unreasonably dangerous condition.)
A social host who provides alcohol to a minor in Michigan may, however, face criminal charges. Section 436.1701 of the Michigan Compiled Laws establishes misdemeanor penalties for a person convicted of providing alcohol to a minor under age 21."