(Closed Permanently) Mazos Hamburgers was established in 1934. The Mazos family has been serving up delicious burgers to the Milwaukee community for three generations. Mazos grounds up their burgers on site every day, so that customers get the freshest burger possible. Shakes and/or malts are still served in the classic metal tins. We encourage you to check out all the photos here on Google and appreciate your honest reviews.