The Dreamhack Marseilles is going on currently and it features a BO1 double-elimination format. The professional teams are used to the best of conditions and the living conditions available to the teams. JW posted a video on social media showing how the things left behind by the teams mean that the next team has to come into a very disgusting smelling room.
https://twitter.com/krimzCSGO/status/986658804937961476