Here are hotels in Colombo known to offer high‑speed Wi‑Fi plus on‑site business / workspace facilities (business centre, meeting rooms, executive lounges or desk/workspace in rooms). I’ve included a short note about the workspace option and a source — I recommend confirming the exact internet speeds and workspace access directly with the hotel before booking.

• Galle Face Hotel (Colombo 01) — historic 5‑star on the Galle Face Green. Offers free Wi‑Fi in rooms/public areas, business centre, conference / meeting rooms and in‑room desks. (wotif.com)

• Hilton Colombo — modern full‑service hotel with free/high‑speed Wi‑Fi advertised, in‑room laptop‑friendly workspaces (desks) and business services/meeting rooms. (bringfido.com)

• Cinnamon Grand Colombo — large 5‑star with business centre, meeting & conference rooms and guest rooms with desks; Cinnamon hotels typically advertise reliable internet for business travellers. (Confirm current bandwidth/options when booking.) (wotif.com)

• Shangri‑La Colombo (Colombo 02) — luxury hotel with executive lounge, business services and meeting rooms; brand standards include reliable high‑speed internet and workspace options. (Check exact Wi‑Fi speed/package.) (executivecentre.com)

• Taj Samudra, Colombo — established 5‑star with business centre, meeting rooms and rooms with work desks; widely used by business travellers. (wotif.com)

• Colombo Marriott / (Marriott properties in Colombo area) — Marriott hotels in Colombo offer business centres, meeting rooms and guest rooms with work desks plus brand Wi‑Fi/business services. (Confirm specific Colombo property availability.) (executivecentre.com)

• OGF Tower / One Galle Face (hotel + integrated workspace) — newer integrated development offering hotel accommodation alongside dedicated, tech‑forward coworking/workspace facilities and advertised fibre/high‑speed connectivity — good option if you need a formal workspace inside the same complex. (likuidspaces.com)

• Hotels near the World Trade Center / financial district (multiple brands) — many downtown hotels cater to business travellers and either provide business‑grade internet or easy access to nearby coworking centres (e.g., The Executive Centre / coworking options in the WTC). If you prefer a dedicated coworking environment, combining a nearby hotel stay with a coworking pass is common. (executivecentre.com)

Quick tips for choosing/booking

• Ask the hotel for measured internet speed or a business/Wi‑Fi package (some hotels have premium paid bandwidth). If you must upload/download or run video calls, request a wired / business‑grade connection or a speed test result.
• If you need a quiet desk or private meeting room, confirm availability and any hourly charges for meeting rooms or executive lounge access.
• For longer remote‑work stays, consider hotels that advertise “business centre + executive lounge” or the integrated One Galle Face/OGF Tower coworking option so you have dedicated workspace and meeting rooms.

If you’d like, I can:

• Check availability and current Wi‑Fi packages for 2–3 specific hotels/dates you give; or
• Narrow this list to hotels in a particular Colombo neighbourhood (Galle Face / Fort / Bambalapitiya) and include direct contact/booking pages.