Triangle Bar and Grill 2122 Monongahela Ave, Pittsburgh, PA15218 Triangle Bar and Grill is the home of the "battleship." What's that? The battleship is a massive Italian hoagie, piled…More high with meat and toppings. Does a battleship sound a bit too daunting? It comes in the smaller "destroyer" and "torpedo" sizes, and even in the "super battleship" size — for those who can't get enough meat. In business for more than 64 years, Triangle Bar and Grill is a landmark in the Swissvale community.