I am not aware of any current food promotions but they are always abundant.
Here is the thing about Laughlin: Every casino marquee advertises food specials. Every one of them. So take a ride along Casino Drive and see signage touting $10.99 for a steak and brew or $3.99 cabbage marinara. Seriously.
At the Tropicana there is a coffee shop with really good deals. My husband got a steak and said it was very good for the price. We also like the buffet at the Riverside and Aquarius. We have eaten at Mark Twain's at Colorado Belle and found it to be very nice. My entire family has eaten there twice and each time they raved about it.