Milwaukee’s walking concierges. Downtown’s spirit squad. Information gurus. Our Public Service Ambassadors (PSAs) go by many names. What remains consistent is their unwavering dedication to keep downtown Milwaukee clean, safe and friendly. From locating missing children to assisting disabled motorists, the PSAs serve as an extra set of eyes and ears for Milwaukee’s police and fire departments-making BID #21 one of the safest districts in the city and one of the safest downtowns in the country.