Music and dancing in weddings?

When I go to weddings (muslim women only weddings) there is usually loud music and a dance floor. The women wear nice dresses (sometimes showing too much skin) and they dance while the loud music is playing. Is this permissible? Should I not dance? Should I not go to these weddings? (even though most or all muslim women only weddings are like this). What about the family hosting the wedding, would they be judged for paying for the singer and the dance floor?