Obama's gutterballs (and Special Olympics analogy) were a source of embarrassment on the campaign trail in '08, so last night when Mayor Bloomberg hit Brooklyn's trendiest bowl spot he kept his scores secret. Brooklyn Bowl closed down to host the mayor, along with Police Commissioner Ray Kelly and several city agency heads, reports the Advance. "It was really a good team-building event," said FDNY Commissioner Sal Cassano, who scored 126 in one game. "We all weren't that good," he joked. When the mayor took off around 10:30, Kelly stuck around, scoring 86 in one game and 106 in another. A spokewoman wouldn't say how the mayor fared, but she did disclose that city sheriff Lindsay Eason was among the evening's big winners.