Why are there so many street bands in European city centers playing American music and Jazz etc?

even stuff like country music too? yuk? I don't want to fly over to Rome, Italy and hear old American pop favourites being played while I am there trying to enjoy Italian culture. why do they do it?
Update: but why do they play that crap in the tourist areas? and what do you mean? avoid Italy altogether? (as it is a "tourist destination)
Update 2: so what kind of dum azzes like to fly to another country and want to expierience their own culture ?
Update 3: BUT I ESPECIALLY NOTICED A LOT OF JAZZ MUSIC, WHY SO MUCH? I NEVER HEAR IT ELSEWHERE
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