In Buenos Aires, whether you need a restaurant reservation really depends on the type of place you’re going:
🍽️ When You Should Make Reservations #
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High-end parrillas (steakhouses): e.g., Don Julio, La Cabrera, El Mirasol. These are very popular with both locals and tourists, and often booked weeks in advance, especially weekends.
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Trendy restaurants in Palermo Soho/Hollywood: e.g., Proper, Mishiguene, Casa Cavia. Hotspots for foodies — reservations strongly recommended.
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Tasting menus / fine dining: e.g., Tegui, Aramburu. Absolutely require advance booking.
🥘 When You Can Usually Walk In #
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Casual parrillas (neighborhood steakhouses): Many don’t take reservations; just show up (better before 9 PM when crowds start).
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Cafés, bodegones, and traditional eateries: Typically first-come, first-served.
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Lunch spots: Except for business-heavy areas, you’ll usually find a table without booking.
⏰ Timing Matters #
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Locals eat late — dinner often starts around 9–10 PM. If you show up at 7–8 PM, you’re more likely to get a table without a reservation.
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Weekends are the busiest, especially in Palermo and San Telmo.
✅ Quick Takeaway #
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For famous parrillas and trendy restaurants → YES, book ahead.
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For casual meals, cafés, or neighborhood spots → no reservation needed.
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If in doubt, call or check Instagram — many BA restaurants manage bookings via WhatsApp or apps like Restorando.