Traditional Italian dances are hard to find in Italy in general. The top three are the tarantella from Puglia, the Sardinian ballu tundu (round dance) and the Neapolitan Saltarello. If you want to dance anywhere that's not a disco, you're best off looking for latin dancing, which is very popular all over Italy and there are plenty of places to learn or just dance the Tango, cha cha, Mumba etc. Also, ballroom dancing is very popular. In general you won't find much folk dancing in the bigger cities but in country towns, or in Southern Italy.
If you want to listen to Italian music on the radio go to radioitalia.it For a full list of Italian singers in alphabetical order go to raggioweb.com
The top ten Italian singers are:
Modern or pop Italian groups