Great — here are romantic hotel picks in Singapore that have on‑site fine‑dining restaurants well suited for couples, with a short note on the mood, cuisine and booking tip for each.

1. Marina Bay Sands — Waku Ghin (Tetsuya Wakuda), CUT by Wolfgang Puck, Spago, Wakuda

• Why go: dramatic city / bay views (tower rooftop level and waterfront), multiple Michelin‑level and celebrity‑chef restaurants under one roof — good for a special‑occasion candlelit dinner plus post‑dinner drinks with a view.
• Cuisine / vibe: Japanese/modern (Waku Ghin), steakhouse (CUT), modern Californian (Spago).
• Tip: reserve well in advance for window/terrace seating and mention “romantic/anniversary” requests. (marinabaysands.com)

2. Capella Singapore (Sentosa) — Cassia; The Knolls (nearby Capella venues)

• Why go: secluded, resort‑style grounds on Sentosa, elegant dining rooms and private‑dining options — very intimate and tranquil for couples.
• Cuisine / vibe: refined Cantonese at Cassia; Mediterranean/sea views at The Knolls.
• Tip: consider a poolside or garden table and combine with an in‑hotel spa for a full romantic day. (tripadvisor.com)

3. Raffles Hotel Singapore — La Dame de Pic, Tiffin Room, Long Bar (afternoon tea & cocktails)

• Why go: iconic colonial setting and restored grandeur — classic romantic atmosphere (lobby tea, signature cocktails, intimate fine dining).
• Cuisine / vibe: Anne‑Sophie Pic’s contemporary French at La Dame de Pic; classic North Indian at Tiffin Room; historic Long Bar for the Singapore Sling.
• Tip: request a table in the main dining room or a private nook and time your dinner to follow the hotel’s lobby/tea experience for full Raffles romance. (tatlerasia.com)

4. The Ritz‑Carlton, Millenia Singapore — Summer Pavilion (one Michelin star)

• Why go: Michelin‑starred Cantonese in a serene, garden‑inspired dining room inside a luxury hotel — excellent for a quietly elegant date night.
• Cuisine / vibe: refined Cantonese (private rooms available).
• Tip: book the private dining room or ask for a quieter corner for a more intimate experience. (summerpavilion.com.sg)

5. The Fullerton Hotel / The Fullerton Bay Hotel — The Lighthouse (Fullerton Bay), La Brasserie / Clifford Pier (Fullerton)

• Why go: waterfront location with sweeping Marina Bay views and intimate rooftop/rooftop‑bar dinner options — classic choice for sunset-to-nightdate nights.
• Cuisine / vibe: modern Italian (The Lighthouse), classic French bistro (La Brasserie), heritage Southeast Asian at Clifford Pier.
• Tip: request a bay‑facing table at The Lighthouse around sunset for great photo moments. (stylishlyme.com)

6. Shangri‑La Singapore — Shang Palace (and other signature restaurants)

• Why go: lush grounds (orchid gardens), resort feel in the city; Shang Palace is a long‑standing Cantonese fine‑dining option in the hotel.
• Cuisine / vibe: Cantonese fine dining, private rooms for a discreet romantic meal.
• Tip: combine an evening dinner with a walk through the hotel’s landscaped grounds. (thetimes.co.uk)

7. Mandarin Oriental, Singapore — Cherry Garden (and other hotel dining)

• Why go: waterfront location and refined Cantonese/Chinese fine dining in a modern, polished setting — well suited to romantic celebrations.
• Cuisine / vibe: Cantonese/Chinese fine dining (classic dishes prepared to a high standard).
• Tip: ask about chef’s degustation or private dining options for an elevated couple’s experience. (littlestepsasia.com)

Quick booking & planning tips for couples

• Reserve early (especially Fridays/Saturdays and around public holidays) and request a specific table/area (bay view, private room, terrace).
• Mention any occasion (anniversary, proposal, birthday) when booking — many restaurants will add small touches (a dessert message, flowers) if requested ahead.
• Dress code: many hotel fine‑dining venues are smart casual or smart; check the restaurant page for specifics.
• Budget: expect S$100+ per person for most fine‑dining hotel restaurants; Michelin‑level tasting menus can run substantially higher.
• Extras: consider pairing dinner with a hotel package (romance, spa, chauffeur) for a turnkey romantic stay.

If you’d like, I can:

• Narrow these to a specific neighborhood (Marina Bay / Sentosa / Orchard),
• Give a short sample 2‑night itinerary for couples staying at one of these hotels, or
• Check live availability and prix‑fix/tasting‑menu prices for one or two restaurants you pick.