Here are several hotels (U.S. — major cities) known for especially stylish lobbies plus well‑regarded or popular on‑site restaurants — good choices if you want a memorable lobby experience and a great meal without leaving the property.

• New York — The Beekman (A Thompson Hotel) — iconic, cathedral‑like atrium/lobby and The Beekman Bar; excellent hotel dining and nearby NoMad/Temple Court options. (en.wikipedia.org)
• New York — The NoMad Hotel — dramatic, richly detailed lobby and a critically‑acclaimed NoMad Restaurant (popular destination in its own right). (en.wikipedia.org)
• Los Angeles — The Peninsula Beverly Hills — classic, elegant Living Room lobby with the hotel’s Belvedere/afternoon tea and restaurant service that draw locals. (mightytravels.com)
• San Francisco — Fairmont San Francisco — grand, historic lobby and landmark tiki/restaurant The Tonga Room (unique dining/entertainment). (en.wikipedia.org)
• Chicago — The Peninsula or The Langham — both have beautifully designed lobby spaces and popular hotel restaurants/afternoon‑tea services frequently recommended for dining in‑hotel. (reddit.com)
• Miami (South Beach) — 1 Hotel South Beach — airy, design‑forward lobby and several popular on‑site restaurants (rooftop/seafood concepts and vibrant bars). (thetimes.co.uk)
• Las Vegas — Bellagio / The Venetian / The Palazzo / Virgin Hotels Las Vegas — all have showpiece lobbies or public rooms and multiple high‑profile restaurants (e.g., fine‑dining and hotspot lounges) that make the hotel a dining destination. (en.wikipedia.org)

If you tell me which city (or cities) you’re interested in, I can give a short curated list (2–5 hotels) for that city with the lobby highlights, the most popular on‑site restaurants, and tips on reservations or best times to visit those lobbies/restaurants.