Time to Face the Music
What?? This is nuts. This is really a super weird level of entitlement from the host and the neighbors. Just imagine the situation! I can’t even imagine how they could have expected the guest to play a concert for all the neighbors upon arrival without checking first. How do they even know the guest knows how to play the violin?
For all the host knows, maybe the guest just had one violin lesson and asked if they can bring their violin because they needed to practice before their second lesson. If I were this guest, I would have fetched a violin and played the most awful concert of all times as revenge and charged a handsome fee for a seat at the concert.