I agree with Carsten Schultz about Küchenradio.
While Freak Show by Metaebene looks like a tech podcast with up to 5 people discussing news at first, it's not typical interview podcast and it's also not just a collection of news bits. They tend to digress a lot resulting in long episodes. If tech and lenght don't turn you off, you might want to give this a try.
Holger Klein's Realitätsabgleich and Wrintheit are discussions between 2 people for about 1 to 2 hours and published along with his other podcasts on wrint.de.
Previously Tim from Metaebene and Holgi published a podcast called Not Safe For Work that might also be what you are looking for and be worth listening to despite provocative the title.