Guests to have played at Koala so far include the likes of: Mark Henning, Lee Jones, Matt Tolfrey, Amir, Alex Arnout, Subb-an, Yaya, Hamid, Massimo Di Lena, Giuseppe Cennamo, Lemos & Glimpse.
Koala Facebook page: http://on.fb.me/98dEGY
Also with it's own podcast series - www.koalaunderground.podomatic.com, or search "Koala Podcast" in the iTunes store.
