Work in an office with a few others workers are in and out but 4 of us in here regularly.
We normally have the radio (2) on quietly and everyone is cool with that (it is my radio but everyone was happy to have it on its quite often on when I am not here).
Today just me and one other colleague in.
She has brought a load of CDs in and had them in really loud on her computer and is singing along and watching You Tube videos on her mobile laughing really loudly while I am trying to phone clients - but turning it down while she is on the phone.
Wish I wasn't so unassertive and could say do you fucking mind?! 