Praise be to Allaah.
There are many differences between Muslim and non-Muslim weddings, such as: the condition that the woman must have a wali or guardian to marry her off, the condition that there be witnesses and that the marriage be announced, that the woman cannot be a mahram (close blood relative) of the man, and that the wedding does not have to take place in a mosque.
The groom can wear any kind of clothing that has been permitted by Allaah, and it does not have to be any specific colour.
It is not permitted for the couple to exchange rings, because this is an innovation that has been newly invented in the religion, and is even worse if the man wears a gold ring because gold is forbidden for men in Islam. It is mustahabb (recommended) for women in particular to sing at weddings and to use the daff (hand-drum), but not any other kind of musical instruments.
It is not permissible for men and women to mix, at weddings or at any other time, or for the groom to sit with his bride in front of the women.
If the women are alone and no men can see them, it is permissible for them to dance, so long as this will not cause undue provocation of desires.
And Allaah knows best.
Sheikh Muhammed Salih Al-Munajjid