Word of the day: serendipitous \ ˌsɛrənˈdɪpɪtəs \ adjective Serendipitous: lucky in making unexpected and fortunate discoveries Mr. Rodriguez and Ms. Jimenez described a recent night, when clubgoers began dancing in the middle of Broadway to the sirens of a stalled fire truck, as emblematic of the serendipitous moments that sometimes emerge from that chaos. Joseph Bernstein…