Here's a guide to some of the main areas and their gastronomic delights, complete with a few restaurant recommendations:

1. Centro:
-Sobrino de Botín: The oldest restaurant in the world (according to Guinness World Records!), serving classic roast suckling pig and lamb.
-Casa María: A traditional tavern with a cozy atmosphere, known for its cocido madrileño (a hearty chickpea stew).
-Juana La Loca: Famous for its creative tapas, especially the "mini-hamburguesa de buey" (mini oxtail burger).
-Casa Lucas: A classic tapas bar with a wide variety of traditional and modern dishes.
-Paella by Rodrigo de la Calle: Enjoy delicious paella made with fresh, seasonal ingredients.
-Pinkleton & Wine: A stylish wine bar with a great selection of Spanish wines and gourmet tapas.

2. Salamanca:
-DiverXO: A three-Michelin-starred restaurant offering avant-garde cuisine with a focus on Asian flavors.
-DSTAgE: Another Michelin-starred gem, serving innovative and creative dishes in a stylish setting.
-La Bien Aparecida: A stylish restaurant with a focus on Cantabrian cuisine, known for its fresh seafood.
-El Paraguas: A popular spot for traditional Spanish cuisine with a modern twist.
-Platea Madrid: This former cinema has been transformed into a gourmet food hall.
-Canalla Bistro by Ricard Camarena: Enjoy creative Mediterranean cuisine in a vibrant setting.
-Sushita Café: A modern Japanese restaurant with a wide variety of sushi and other Japanese dishes.

3. Chueca:
-Amazónico: A trendy restaurant with a jungle-inspired decor, serving up Latin American cuisine and delicious cocktails.
-La Tasquita de Enfrente: A Michelin-starred restaurant offering a modern take on traditional Spanish cuisine.
-Mercado de San Antón: This modern market offers a range of gourmet food stalls.
-La Cocina de San Antón: Enjoy delicious tapas and traditional Spanish dishes on the market's rooftop terrace.

4. Malasaña:
-Ojalá: A popular spot with a cool vibe, serving up creative tapas and international dishes.
-Vacaciones Cocktail Bar: Enjoy delicious cocktails and a relaxed atmosphere in this trendy bar.
-Pez Tortilla: Famous for its delicious tortillas, with a variety of fillings to choose from.
-La Bola: A traditional tavern serving up classic Madrileño dishes like cocido madrileño.

5. La Latina:
-Casa Lucio: A classic tavern known for its "huevos rotos" (broken eggs with potatoes and ham).
-Taberna El Tempranillo: A cozy tavern with a great selection of Spanish wines and tapas.