Here are well-regarded hotels in Singapore that offer executive/club lounges and (generally) fast/premium Wi‑Fi. I’ve listed a mix of locations and price tiers — I recommend confirming lounge access and exact Wi‑Fi performance with the hotel or on the rate you book (club access is often tied to specific room categories or paid upgrades).

Top picks (central / Marina Bay / Orchard)

• Marina Bay Sands (Marina Bay) — has club-level/club lounge options for club/club rooms and premium Wi‑Fi across the property.
• The Ritz‑Carlton, Millenia Singapore (Marina Bay) — Club/Executive lounge access available with club rooms; known for good business amenities.
• Mandarin Oriental, Singapore (Marina Bay) — Club lounge (MO Club) with dedicated services and premium internet for guests with club access.
• The Fullerton Hotel Singapore (Cliff/Marina area) — Straits/Club lounge and reports of reliable, fast hotel Wi‑Fi. (executivetraveller.com)

Orchard / City (shopping & business)

• Shangri‑La Singapore (Orchard) — Horizon/Club-level rooms with a dedicated lounge and strong business services.
• Pan Pacific Singapore (Marina Square / Marina Centre) — Pacific Club (club lounge) and premium Wi‑Fi for club guests.
• Mandarin Orchard / hotels on Orchard Road — many large chain properties offer club floors (confirm per hotel).

Business / design / newer hotels

• JW Marriott Hotel Singapore South Beach (City/South Beach) — has an Executive Lounge with extensive food offerings and business amenities. (tripadvisor.co.uk)
• Conrad Centennial Singapore — Club/executive lounge options and business-grade Wi‑Fi.
• Four Seasons / Four Seasons-type luxury hotels in Singapore — usually offer Club/Executive Club rooms with premium Wi‑Fi. (fourseasons.com)

Other luxury options

• Fairmont / Swissôtel The Stamford / Raffles-area hotels — many have club floors or executive lounges and business-level internet options. (Check the specific hotel brand pages for “Club”, “Executive Lounge” or “Club Floor” benefits.) (travel.prestigetravelae.com)

Notes and quick tips

• “Executive/Club lounge” is often a category benefit (only included with certain room types) — check whether your rate includes lounge access or whether you must pay or upgrade at check‑in.
• Wi‑Fi quality varies by hotel, floor and time of day. Many luxury hotels advertise “premium” or “business” Wi‑Fi for club/club-floor guests; if you need guaranteed speeds for video conferencing or large uploads, ask the hotel to confirm their typical bandwidth or whether they offer a dedicated wired connection in-room or a business center.
• If you want, I can: (a) check a shortlist of specific hotels for current club-access policies and exact Wi‑Fi features/speeds, or (b) compare lounge hours/food offerings for 4–6 hotels you care about. Which would you prefer?