If a restaurant has x% less business, they can buy x% less 'proteins' and x% fewer servers.
But they are screwed on the fixed costs, which is mostly rent.
The thing is, these are not normal conditions. Real-estate owners everywhere are as worried as anyone about their business.
If restaurants and other such businesses start collapsing - they will take a whole chunk of businesses with them - and maybe even risk the viability of some banks.
If one major bank has been doing stupid things, like Bear Sterns, and collapses, it could take the whole system down.
(Don't want to chastise but HNers could develop a stronger appreciation for how all of this stuff is connected and there are some really scary outcomes from this economic meltdown)
So - there might be a kind of reckoning.
Restauranteurs could legit approach landlords and say: "If my rents stay the same, we go bankrupt, you won't see a dime, and you will not rent this place for a year, and when you do, it will be for 20% less"
That's a credible premise.
In other words - the property is really worth a lot less.
So it's hopefully an opportunity for some hard bargaining.