1.   It also, after the talk and laughter and the samba drum beats, seemed strangely silent and hushed.

2.   When I hear certain syncopations and drum beats, I can tell if they were enunciated by a black American.

3.   Indigenous dancers in feather headdresses gyrated to drum beats outside.

4.   Protesters with their arms linked often shuffle to drum beats and their rallies sometimes resemble carnivals.