My favourite thing during all-hands meetings is estimating how much it costs in salaries for us all to be there.

When potentially dangerous work is carried out there should be a risk assessment prior to commencement of the work. I am of the opinion that meetings should be preceded by an "is this a good use of everyone's time" assessment. Can it be done online? Does everyone invited actually need to be there? Do the potential benefits justify the costs? Is this a finance meeting and, if so, will you provide energy drinks and toothpicks to keep eyelids open?