Not sure if this has changed, but for a while you couldn't login if you blocked the Facebook cookie (I.E., running disconnect.me and logging in only via Twitter). Very annoying to debug.

I can't use it either; sadly they are only open to the US. But I checked out the site Steven linked (plug.dj), it's open internationally. They use YouTube and Soundcloud for music/videos so you can play almost every song you want. For now you need Facebook, Twitter or Google+ to sign up but I heard a email sign up function is in the making.

And if you really want to try it out you could consider make an anonymous Twitter account to sign in with.

I use both Twitter and Facebook (unfortunately), but I would rather not have to link my account with either of these services just to log into your website

Did the same with tt, and it started posting stuff on my facebook account. I changed to plug, where i also had to use facebook to sign up. But it never posted anything on itself or did anything, just by clicking the share button in the room i could post it on facebook. So it's safe to use i guess.