You guys are so cute...
Nathans hotdogs? It's a garlic beef salchicha called a suissa and made short and broad. Cooked over charcoal and served with onions cooked in a mixture of ketchup and mustard until soft in a crocante roll.
Coffee? Select any of the artesenal coffee brands grown throughout the country until you discover your personal favorite. Support your local communal.
Ice cream? Haven't spent much time in the Sierra have you. Artesenal ice cream is truly a hand made art passed down through generations. But if you need a quick fix Sorbetto is ubiquitous at the Mall and Pinguino is the local Good Humor. The Pollito is usually just a quarter.
And gambling? I hear Peru is the place to go. It's also hands down the gourmet capital.
BTW, come visit Montañita. New Restaurant: Fumarola Uruguaya just past the church. Fabulous! Chef Jose Luis does things with a filet, chicken and fish that will make you sing