Green’s Dictionary of Slang

SOOB n.

(N.Z. gay) a Small Owner Operated Business/Brothel, which employs four or fewer private sex workers and thus does not qualify as a brothel and needs no license.

[NZ]W. Ings ‘Trolling the Beat to Working the Soob’ in Int’l Jrnl Lexicog. 23:1 76: Today, most privates work out of a SOOB. This is a recent acronym for Small Owner Operated Business/Brothel .