Tommy--Here is the listing from the 1927 Ann Arbor City Directory. Dan was a nickname. Trade tokens like this were used all over - in the case of yours, a business may have allowed "small stake" gambling at card or pool games. Rather than using money which would have been patently against the law, they had tokens made which were used instead of cash. Same effect, but it went under the radar of the law enforcement people. Trade tokens with the name of an individual proprietor are not at all unusual. The book of Michigan Trade Tokens is almost three inches thick. Please do take better pics and post this one on tokencatalog for the good of the hobby, or, with your permission, I could post them.
John in the Great 208