The local Dallas Derby Devils version is rough but there is typically not any direct fighting. That's kinda frowned on and there are penalties. A lot of familys with kids go to these....like myself. There is plenty of roughness without fights.
These monthly competitions are to raise money for the "travel team" from Dallas. This is the one that actually travels the country to compete with other teams.
http://derbydevils.com/news.phpCheck out the video from BigBadSportsDaddy on the site. That was the one we went and saw last month.
The names some of these girls use are funny like Miley Virus. Here is my Audrey with her yesterday evening.