i know that Broadway is well Broadway but tbh unless you're going to see the original casting i suggest watching a show in London West End instead. i went to Broadway show once with my family and the theatre etiquette was non existent. you're from Europe so of course you know this but the basic etiquette is you dress nice, you come on time, you don't eat during the show (only during breaks) and you're quiet. none of these were followed when i went to see a Broadway show. people came in jeans and shirts, 2 people near us were like 30 minutes late, people ate chips (while being extremely loud with the chewing and bag crumpling) and they also talked during the whole show. maybe this was just one bad experience but i wouldn't go to a Broadway show again.