weds + thurs (various dates thru 8/8): lincoln center’s summer for the city: lincoln center’s annual campus-wide arts festival returns with two months of free and choose-what-you-pay concerts, performances, film screenings, dance parties, and more. this week: social dance with glad rags orchestra (weds 6::30pm); silent disco with madame gandhi (weds 10pm); brazil day performances and a silent disco (thurs various times); and more.