Myself and a friend are going to be wearing S & M gear while a female friend will be going as a dominatrix. My friends already have their costumes. I'll be getting mine in a few weeks when I go back to the States on leave.
She'll be wearing this getup complete with a whip, collars, and chains to keep us in check.
Here he is proudly sporting his garb:
I'm sure we're bound to get an interesting reaction given the fact that we will be attending parties on a military base. Should be a doozy.