I say, and with God's success: Since music is generally controversial, and although the four schools of thought declare it forbidden, there are opinions within the schools that permit certain forms. It is not a sin that is unanimously agreed upon like alcohol and forbidden mixing. Therefore, it is permissible to attend these events on the condition of not participating in the forbidden, so as not to cut off family ties, given the widespread calamity in this matter. And God knows best.