BYSTEVETHOMPSONOnweekdaymornings,Lew-isWatts,67,rollsoffhismattressbeforesunrise.Helightsacigaretteandwaitsforahonkfromthecurboutsidebeforeleavinghistinysecond-floorapartment.often,hispathdownstairsisblockedbypassed-outdrugusersandwhattheyleavebehind—beercans,theremnantsoftakeoutmeals,theburntsmellofcrackcocaine.Wattsstepsoverthesegrimfig-ures,annoyedbutunderstand-ing,resolvingtostaycleanan-otherday.HereinthesmallapartmentbuildingsalongQuincystreetinnorthwestWashington,theDis-trictpaysadevelopertohousesomeofthecity’spoorestresi-dents.Thearrangementispartofthecity’spermanentsupportivehousingprogram,akeypieceofMayorMuriele.Bowser’seffortsseeHouSINgona6s...