You should be fine..135m2 is around 1400 s/f. Most codes and the room you need per person is 3 s/f per person. If 1 person per chair is figured , thats around 1200 s/f thats needed. Crowded room but its enough. Check local fire codes to be sure your ok. GL
Surely.
A room with stage in front around 5 square meters. Will the remaining space fit 300 chair
