You see the posters all over major European cities, especially during tourist season: classical music concerts in famous local churches. "Tonight, 8 PM, in the Church of Our Lady: Mozarts Eine kleine Nachtmusik ("A Little Night Music")." Or Vivaldi's Four Seasons, or perhaps Mozart's Jupiter Symphony. It's always a well-beloved classical chestnut, recognizable to all. The performers are usually an ensemble you've never heard of, like the "Glorious Classical Strings," or the "Soloists of Rome," or something similar.
I don't want to be too snobbish here: there's nothing wrong with performing classical music in glorious churches for the benefit of tourists. I've been to a few of these concerts myself, since that might be the only thing going when you hit the city. But the performers tend to be either students supplementing their income, or rather bedraggled-looking adults. The problem is that they have to play the same pieces -- popular, recognizable classical hits -- 3-4 times a week, with no real variation in the program. How much verve and sizzle can you bring to your 3,467th performance of Eine Kleine Nachtmusik?