Ordinance amending the Planning Code to update and reorganize Neighborhood Commercial and Mixed Use Zoning District controls, including, among other things, to 1) permit Accessory Arts Activities, and production, wholesaling, and processing of goods and commodities, to occupy more than one-third of total space in Commercial (C), Downtown Residential (DTR), Eastern Neighborhoods Mixed Use, Mission Bay, and Residential-Commercial (RC) Districts; 2) principally permit Arts Activities, Job Training, Public Facility, and Social Service and Philanthropic Facility uses in the Folsom Street Neighborhood Commercial Transit (NCT), SoMa NCT, Regional Commercial, and certain Eastern Neighborhoods Mixed Use Districts, and in historic and nonconforming commercial buildings in Residential Enclave Districts; 3) principally permit General Entertainment in the Folsom Street NCT District; 4) principally permit Bar uses on the second floor in the Folsom Street NCT and Regional Commercial Districts; 5) principally permit Nighttime Entertainment on properties fronting Folsom Street between 7th Street and Division Street and properties fronting 11th Street between Howard Street and Division Street unless they are zoned Residential Enclave District (RED) or Residential Enclave District - Mixed (RED-MX); 6) principally permit Job Training, Public Facility, and Social Service and Philanthropic Facility Uses in the SoMa NCT District and certain Eastern Neighborhoods Districts; 7) require that large developments in South of Market Mixed Use Districts which contain commercial spaces provide a mix of commercial space sizes; 8) require that all Nighttime Entertainment uses comply with the Entertainment Commission’s good neighbor policies; and 9) remove certain limitations on location for Nighttime Entertainment and Animal Services uses in the Western SoMa Special Use District; and adopting environmental findings, findings of public necessity, convenience, and welfare under Planning Code, Section 302, and findings of consistency with the General Plan, and the eight priority policies of Planning Code, Section 101.1.