A Hafla is a Sala'kiri tradition that is spontaneously celebrated on weekends, but can also occur at random times.
The tradition involves heavy consumption of alcoholic beverages mixed with stimulating materials such as coffee or Bluebull. The drinking is often accompanied with group singing, where a magical horn is passed among the participants, amplifying their voice as they each sing a popular folklore song of their choosing. While performing, the singer will try to sound as similar as possible to the originally accepted performance of the song, with several participants often competing among themselves on who's performance is superior. It is also common to discuss the current political and cultural issues, gossip and exchange information while participating in one. Some haflas are more organized than others, occurring at regular intervals, and often contain the same group of people. On the other hand, some people may not have one group, but spend the night traveling between several groups.
To non-sala'kiri observers, a hafla might sound disorganized and even violent, especially as the spirits get higher. This rowdiness can be extremely loud, particularly when sining is involved, however it is mostly harmless provided it remains undisturbed. Outsiders should avoid disturpting a hafla, unless they intend to join, in which case they would more often than not find themselves heartedly welcomed.