Eidul Fitr

Asalaamualaikum.  I have a question that I would like your esteemed thoughts and response on. On the night that the moon is sighted for Eid-ul-Fitr, many women get together and have a party for women and little girls, they cook special foods, get dressed –up, wear beautiful clothes, and jewelry.  They get together and put on henna, and sing and dance in celebration.  There are absolutely no men around.  Many other women look very down upon this and say it is haraam.  They say that we should all be doing ibadaat.  Some say that Eid begins once the last fast has broken, others say that you should do even more ibadaat on that night., I always use to go before, but I want to know your opinion. Please answer, does Eid begin once the moon has been sighted and the last fast is broken? Should this night also be used for worship or cam we have parties  like this on that night, or should we have it one some other night.  Please answer, you are a great scholar and I value your opinion greatly. Jazakullahasalaam u alaikum Ramadan Mubarak