LSS's description is entirely accurate.  I had a hernia surgery and got a bill for 20k in the mail!!!  Luckily the insurance evaluator had just not had the opportunity to look over the file and it ended up being covered.  
I almost shit my pants!
Sad thing is the way it is set up you don;t entirely know if a procedure is covered until after the procedure.
Back to the OP's question,
I would say foam roll the glutes as that is where the musculature that controls/is attached to the itb is located.
Cross your leg over the other knee and roll out the glute of the crossed leg.  IT issues almost always have a ton of hot spots on this