Happy Blimp
Happy Blimp is a burger shop in Liberty City in Grand Theft Auto III. It is advertised throughout the city on billboards with the slogan "Inflate Your Waist!", referencing the unhealthy fast food they serve. Happy Blimp seems to be a pardoy of Blimpie Sub Shops, even though their logos look nothing alike and they don't serve the same type of food.
Happy Blimp plays a part in a radio advert for the reality TV show Liberty City Survivor, a show where "20 recently paroled guys [are] equipped...with grenade launchers and flamethrowers and have to hunt each other down..." In the advert, a fan says "I was grabbing a sandwich at the Happy Blimp, and suddenly two guys crash through the window and start shooting at each other. I was so excited, I didn't even notice I'd been hit! After that, I was hooked on Liberty City Survivor. I watch it every day in the hospital!"