Cauvery hostel mess officials on Monday said the menu is predetermined and cannot be changed at the last minute “without the approval of hostel residents”, a day after two groups of students clashed over serving non-vegetarian dishes. JNU’s Kaveri Hostel Mess. On Sunday, the JNU Students’ Union, which is run by Left groups, and the right wing ABVP fought in the hostel over the issue of non-vegetarian food being served on Ram Navami.