I’ll admit: it took an assignment -- "I’d like a report about exhibitions in another borough!" declared my editor -- to get me to galleries in Brooklyn. Shocking, I know, shameful even, but it’s the truth. Lucky for me, last weekend the Williamsburg and Greenpoint art scene was hopping, as it is most weekends, or so I gather. So out I went, despite frigid winds and nearly insurmountable snowdrifts, and found myself in good -- and good-looking -- company.