The Zoological Society of Milwaukee wrapped up a successful "Puttin’ on the Ritz" fundraiser at Potawatomi Hotel & Casino Jan. 23 in which a silent auction, a 50/50 raffle and boxing drew 436 Milwaukee-area business and community leaders. Check out the attached slideshow put together by Milwaukee Business Journal photographer Kenny Yoo to see photos from the popular event. The fundraiser featured amateur boxing in the Event Center of the Potawatomi Hotel & Casino in Milwaukee's Menomonee Valley…