I was just surfing the Las Vegas Advisor message boards and came across a post for a 50% off discount upon check out on www.restaurant.com (link below). Holy cow, got a $25 dining certificate for a total of 5 big bucks!
The cool part is you don't have to wait for them to mail it to you....after you pay, you simply download and print your certificate. It's good for 1 year from when you buy it. Now we're all set for one lunch while at the convention for $5....I'm so cheap I squeek when I walk!
Check out the link, surf the Vegas restaurants, find something you want? - enter code 85792 (good through 4/16 ) on your order confirmation page (step 2) at the top and click "recalculate total". You will get 50% off the total.
I would imagine this discount would work in any city you look up within their website, but didn't try anywhere else but Vegas.
Cool huh?