At Salon Vox in downtown Ann Arbor, exceptional customer service is considered an essential part of the guest experience. Until last year, that included occasionally offering complimentary alcoholic beverages to guests while they had their hair styled. What harm is there in a free glass of wine or beer? It turns out if a business doesn't have a license to sell liquor, it isn't even allowed to give away alcohol, according to the Michigan attorney general's office. Salon Vox, 115 W. Liberty St., is now making a push to change state law to be able to offer up free drinks to customers — without the threat of getting charged with a misdemeanor crime.