Recent news affecting co-op / condo buyers, sellers, boards and residents. Lots of board news this week, as a condo board in Tribeca files a lawsuit to keep a Crunch gym out of its building, and the co-op board of Co-op City fails to have its residents pass a five-year cable-TV lock-in with Cablevision. Experts answer whether a co-op board can force out a registered sex offender, and whether a building might gain air rights anew after selling them years ago. Plus, co-op prices go down, condo prices go up, and Drew Barrymore buys an apartment.