Zeeskite- i agree with you entirely. i believe it is a day of kedusha for the chosson and Kallah and some of the dancing and music can be a little rocky but there are 2 reasons for this kind of dancing (depending on the people).
1- they want to dance in a goyish way
2- they got carried away in all the excitement
both reasons are valid and yet i think everyone should be aware of what they want to do and if they dont want to dance like that then they should be careful with themselves, thats all.
plus the GOQ is right, if you are one that does not want that by your wedding, just make sure to read over the list of songs your band wants to play and make sure theyre not too rocky. The kind of music played by a wedding can make all the difference.