Is it ok? if i use content from Mardi Gras....
 

If i have my own pics from Mardi Gras party or blue moon party
Can i use them for my content?

only if you throw me some beads!

but seriously, model releases??? how old are they really ;)

Check out my public nudity articles @ hotwirednet.com/articles.htm
It explains the legality of using public nudity pics. :)