Wa `alaykum as-Salamu wa Rahmatullahi wa Barakatuh.

 

In the Name of Allah, Most Gracious, Most Merciful.

 

All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.

 

If the music and dance are lewd and contain promiscuous or permissive intermingling between males and females, then one should avoid them altogether. If however that is not the case, then you should not boycott such weddings. Islam does allow music that is considered as clean and free of unethical subliminal messages.

 

Allah Almighty knows best.