Sometimes just because you can is good enough reason to do so?
Playing is for grown ups as well so last.fm radio stations are now playable on altnation via the Guide band pages
Go to any band page (eg.
Levellers) and on the left there will be a last.fm box where you can listen to related music. You'll have to cick it to start up the tunes - last.fm has more tunes than we have pointy sticks to shake at them but obv some obscure bands won't have music to share (yet).
You should also see a clipped list of similar bands next to the player that you can click on & mibbe find out more or listen to their station instead.
It can be a great way to find new bands if you start with a band you like, click through the similar bands or just leave the page open in another tab while you browse and never worry about embarrassing radio jingles again.