I got discount dinner reservations at Planet Dailies, Emeril Lagasse's Table 10, and at Spago. I got discount vouchers for All Shook Up and Hitzville. And I did it over the phone!
It turns out that for restaurants, you can call about five days in advance and order the vouchers and a reservation time. For lesser shows like All Shook Up and Hitzville, you can call about three days in advance and order the vouchers. You can even use their website coupon.
We showed up about 8p on a Friday night, waited in their one line for just a few minutes, and then picked up all of our vouchers and paid for them with my credit card. Show your picture ID.
Worked like a charm.
I think for the more major Vegas shows, you do have to get in line the day of the show and then go as soon as you can to the show to get your reserved seat. But for shows like All Shook Up and Hitzville, you just show up at the theater with your voucher and get in line for their general admission seats.
I noticed that for shows like All Shook Up and Hitzville, it's possible to get the same discount from coupons in publications in hotel rooms and taxis, but getting them in advance from tix4tonight.com made it very easy.
The people I spoke with on the phone at tix4tonight were just super. Very helpful.