Not really a chain but an off-shoot of El Torito here in SoCal is El Torito Grill. Tuesdays is 'Taco Tuesday' and you get your choice of chicken, beef or pork delivered by the chef, hand cut on two soft tacos that are grilling on a rotating grill right in front of you. You add you own toppings and, I'll tell ya', one of each of those choices will fill you for the evening. You have to leave your table for a few minutes to go over to where these are being prepared but it takes less than 5 minutes and and you get to tell the chef exactually how you want the meat cut.
Cost: $1.50 each in an upscale, sit-down restaurant! Add a drink and you're outa' there for about $7.50 - $9.00 plus tip. And it's a fun crowd too. I go to the one at Fashion Island in Newport Beach.