Answer:
The attempt to bring peace on earth through dance slowly dissolves into a mambo battle where each group displays their moves. Who knew? Apparently white guys can really dance. Of course, they had help from Jerome Robbins. In the chaos, Tony and Maria see each other from across the room and lock eyes. The music slows and the rest of the scene fades away like they're the only two people in the room. Bernardo bursts in to separate them. Maria's dragged off and Tony's left still in a daze. Riff and Bernardo agree to a war council.
Explanation: