Northern Ireland has a rich musical culture similar to that of the south of Ireland, with its strong folk roots and an added Scottish influence. Traditional Irish music, originally played at weddings and wakes, can be heard in most country pubs, and in a cluster of bars in the central district of Belfast. Old-style songs -- popularly known as séan nós, a sort of storytelling with music -- are still very popular in the border counties. "Sessions" have become the stuff of legend, and are best described as spontaneous gatherings of musicians, which anyone can join if they have an instrument. They usually feature the bódhran (a kind of drum), the tin whistle, the fiddle, and the uillean pipes -- a fiendishly difficult instrument to master, much like the bagpipes. Unfortunately, today's visitors are more likely to hear a hired band playing traditional music than an authentic session, but the spirit remains. If you're a classical music buff, check out the world-class Ulster Orchestra, based in Belfast's Ulster Hall but also appearing in Derry, Armagh, and Enniskillen. If you love opera, don't miss Castle Ward Opera Festival -- set in the spectacular surroundings of Castle Ward estate in Strangford, County Down, the annual event takes place in June. Meanwhile, Belfast's nightclubs groove on all frequencies, from pop hits to techno to hip-hop. Visitors should make like the locals and consult The Big List, a free and detailed guide to what's on in every pub and club in the city (which can be picked up at most bars and restaurants).