Batukada

Batukada is a music genre that consist of a group of drummers. The drummers have a leader that can use hand signals to change beat, bring out a soloist, increase intensity, etc. It is popular in Brazil, Spain and in other countries. I have refered to it in a number of Spain reports.
Here is a wiki describing it:

http://en.wikipedia.org/wiki/Batucada

Here is something about the groups in Alicante. The first two have u-tube videos that can be seen. Some of the other can be seen from their web pages.

http://www.unaplauso.com/batucada-en-alicante_it_p12_t17c4_1.html

However, to hear a good group live is much better then the utube video, so if you get the chance see one live, do it!