Located on the Southwest corner of 15th and State, the Green Tree was a hole in the wall that catered more to the local parolees, than Marquette students. However it was also the perfect place for a freshman to try out his fake ID. Known for its famous Blatz draft specials, the grizzled bartender would usually just size you up, rather than look at an ID. If you were with a group of four he might say, “you, you, you, not you.” It seemed to be totally random.

During the late 1980s, the Green Tree generally catered to Marquette's underclassmen with $3 all-you-can-drink nights (from 8-11pm). The owner, known as 'Fat Pat', and bartender, Dick, packed in the crowds who realized that a lousy fake ID was good enough to drink Busch Light for a few hours.

It is believed that this bar closed its doors in the winter of 1991.