Ruling on Attending Wedding Parties That Include Singing

Question:
What is the ruling on attending wedding parties where there is singing, whether by men or by women?

Answer:
Wedding parties are subject to specific details:
If the party is protected by the Shari'ah, there is nothing wrong with it; men and women may attend, with women with women and men with men.
If it contains what Allah has forbidden, one must refrain from it. If there is free mixing of men and women, it is not permissible for a woman to attend with them, and it is obligatory for the wedding party to enjoin good and forbid evil regarding that, and it is obligatory for the authority to enjoin good and forbid evil regarding that, so that this free mixing does not occur.
Likewise, if it contains entertainment: such as the 'ud, the violin, and drums; prevention is obligatory. As for the ordinary duff among women, there is nothing wrong with it; the duff that has one face—namely the tār—which women strike exclusively among themselves on the wedding night; there is nothing wrong with this. This was done in the time of the Prophet (peace and blessings be upon him) and the time of his Companions to announce the marriage and make it public. As for using other things like drums, the 'ud, and the like of instruments of entertainment, or the mixing of women with men; this is something that harms people, and it is what is wrong, and it may cause the loss of the prayer—the Fajr prayer—due to staying up late, so this is not permissible.
The point is that the wedding party must ensure that their gathering and party are restricted by the Shari'ah, in part of the night; so that they may sleep, and so that they do not lose the Fajr prayer.