Prague is something of a cultural Mecca, and not just because of the affordable tickets. There was always a lively tradition here (Mozart was celebrated as a hero in Prague while shunned in Vienna), and the influx of culture-hungry tourists in the past decade has led to an enormous variety of concerts. Tickets are best and easiest booked via the ticket agencies. Remember, going to the theatre or opera is still something of an event in Prague, and it’s courteous to dress up when visiting.