SPOILERS - Jorrvaskr is a Frathouse - Kaidan Immersive Features 

These random conversations all take place anywhere within Whiterun city limits after the mini story of Farkas and the Flowers if you're in proximity to Farkas and Vilkas. The best place to hear them is in the evening at Jorrvaskr. I hope these conversations demonstrate the maturity and seriousness of the Immersive Features mod team. These were all written by Aubrie, who is also very serious.