There is lots of dancing to be experienced in Barcelona and one
in particular you really should try to at least watch, if not try
yourself, is the Sardana, the national dance of Catalunya and an
important part of Catalan culture as it's seen as a representation of
their identity and pride.
The Catalans were viewed as a threat by
the dictator Franco who ruled the country from the end of the 40's to
'75, he hated them for their strong independence and refusal to submit
to his rule, as a result he banned many of their local customs...