These restrictions were later declared unconstitutional in Chiasson I and Chiasson II. The City responded with the 1989 revision to the Zoning Resolution, adding restrictions
Use Group 6. Interestingly, the 1961 versions of Use Group 6 fails to mention dancing, most likely a drafting oversight.
Eating or drinking places, including those which provide outdoor table service or incidental musical entertainment either by mechanical device or by not more than three persons playing piano, organ, accordion, guitar, or any string instrument.
See Use Group 12 which does mention dancing.
Eating or drinking places, without restrictions on entertainment or dancing.
Use Groups 1961 Zoning Resolutionspage 110 Use Group 12
Complete 1961 Zoning Resolution.
City Planning Commission 1961 Report and Resolution.