Conferences and trade shows. While many of the individual organizations that put on the conferences have been able to pivot to doing them virtually, some simply can't, and the fallout from no large live meetings has been devastating. It's not just the hotel employee's and local business that get impacted. It's the AV techs, the decorators, the caterers. Most of those companies have cut their staff between 50-90%, and I know of a couple that have already folded.