Praise be to Allah.
If the parties are as described in the question, it is not permissible for anyone to accept the invitation, unless he or she is able to remove the evil things (munkar). In that case it is obligatory to accept the invitation for the purpose of removing the evil. But if he is not able to do that, then it is not permissible to attend these celebrations which include all or some of these things which go against sharee’ah. And it is not permissible for anyone to allow his wife or daughter or other female relative under his guardianship to attend these parties. If he says, I am afraid that there will be a rift between me and my relatives or that the ties of kinship will be broken, we say, then let that happen, because when they disobeyed Allaah by having parties of this kind, there is no duty to accept their invitation. If they then break the ties, the sin is on them and there is no sin at all on the one who refused to attend these celebrations.