AAARRRRG! Don't do it!
Just kidding, but really, the economy is so poor right now that it probably wouldn't hit the break-even point for several extra years beyond the norm.
Think about it this way:
If you're trying to hold onto your money during any type of recession (like this one) - what's the *first* thing you stop doing? - Eating out. It's dispensable. On the other hand, if you're wealthy and live in an area that is generally financially unaffected (due to the area being 'rich') then it may not matter, and you could charge what you want, but I'm betting that those places are getting scarcer by the minute!
Good luck to your friend(s) - but my better judgment says I wouldn't do it for anything right now.
Psychlone