Here are top hotel event venues in Colombo, with the key spaces, typical capacities and what each is best for:

1. Shangri‑La, Colombo — Shangri‑La Ballroom (divisible) + Lotus & Spice ballrooms; extremely large capacities (Shangri‑La Ballroom reception/theatre up to ~3,000/2,500; Lotus ballroom ~600). Best for large conferences, gala dinners and big weddings. (shangri-la.com)

2. Hilton Colombo / Hilton Colombo Residences — pillar‑free Grand/Union Ballrooms and multiple meeting rooms (Union Ballroom theatre up to ~1,100; several smaller divisible ballrooms). Great for conferences, exhibitions and large weddings. (hilton.com)

3. Taj Samudra, Colombo — multiple ballrooms and lawns (Samudra/Grand Crystal ballrooms; landscaped lawns that can host ~1,000–2,000). Strong choice for ocean‑view banquets, product launches and large outdoor events. (tajhotels.com)

4. Cinnamon Lakeside Colombo — King’s Court (master ballroom), Earl’s Court, Waterside lawns and unique lakefront/“floating” options. Best for stylish corporate events, weddings and lakefront receptions. (cinnamonhotels.com)

5. Cinnamon Grand Colombo — Oak Room (main ballroom), Atrium and several flexible meeting rooms (rooms for small to very large events). Good for conventions, formal dinners and multi‑room conferences. (cinnamonhotels.com)

6. The Kingsbury, Colombo — Balmoral (large ballroom ~676 m²/≈500 pax), Victorian, Winchester and several boardrooms. Well suited for grand weddings, gala events and harbour‑view functions. (thekingsburyhotel.com)

7. Galle Face Hotel — Grand Ballroom, Jubilee Ballroom and the Chequerboard lawn (oceanfront; Chequerboard can host very large sundown events up to ~1,000). Excellent for heritage/oceanfront weddings and high‑profile social events. (gallefacehotel.com)

8. The Galadari Hotel — large Grand Ballroom (expandable/partitionable; reported capacities commonly up to several hundred—often quoted up to ~800–1,000 depending on setup) plus smaller function rooms. A long‑standing choice for large conferences and exhibitions. (galadarihotel.lk)

9. Mövenpick Hotel Colombo — several meeting rooms and banquet spaces (largest rooms ~200 sqm and multiple flexible venues plus rooftop/terrace options). Good for medium‑sized corporate events and creative social functions. (colombogazette.com)

Notes and tips

• Capacities vary by seating style (theatre, banquet, classroom, cocktail). Always confirm the current capacity, floor plans and audio/AV support with the hotel.
• For outdoor/lawn events (Cinnamon Lakeside, Taj Samudra, Galle Face), check seasonal/weather options and whether marquees/AC are provided.
• If you’d like, I can: (a) shortlist venues by your expected guest count and event type (conference, wedding, product launch), or (b) fetch current availability and contact details for 2–3 hotels you prefer.

Would you like a shortlist based on guest count and date, or live availability/pricing for any of these?