The Bismark was a turn of the century tavern located where the Old Town Tavern is now, as 122 W Liberty St in Ann Arbor.
Timeline: The Bismark
The 1911 Polk Directory lists a saloon with Thomas E. Rogers as proprietor, "Fine Wines, Liquors and Cigars".
The 1908 Polk Directory shows the business as "The Bismarck", and lists Nicholas Schneider as proprietor.