London · South Kensington
Millennium Hotel and Conference Centre Gloucester London
A 611-room hotel on Harrington Gardens in South Kensington, sharing its street numbers with Grosvenor Casino Gloucester Road, where the gaming floor and its tables are listed as open 24 hours, seven days a week.
Hours below
- ADoorstep
- ADoors
- ADealing
- AArrival
- BStay

From the lobby to the floor
The gaming floor is inside the hotel’s own building.
Two readings exist, and this site shows both. On the Gambling Commission register, Grosvenor Casino Gloucester Road sits at 4–18 Harrington Gardens, SW7 4LJ; the hotel uses 4–18 Harrington Gardens, SW7 4LH. Same numbers, postcodes one letter apart, which is why the gaming floor is counted here as inside the hotel building.
The hotel's own accessibility guide, however, describes the casino as immediately next door rather than inside. Neither source describes an indoor passage from lobby to gaming floor, and no walking time is published, so check the route at the front desk.
Evidence: the Gambling Commission register gives the casino premises at the hotel’s building or block.
The week, hour by hour
Each line is one day from midnight to midnight. The wide band is the casino floor, the narrow one the live tables, and the brass tick marks when the room is ready.
| Day | Casino floor | Live tables |
|---|---|---|
| Monday | open all day and night | open all day and night |
| Tuesday | open all day and night | open all day and night |
| Wednesday | open all day and night | open all day and night |
| Thursday | open all day and night | open all day and night |
| Friday | open all day and night | open all day and night |
| Saturday | open all day and night | open all day and night |
| Sunday | open all day and night | open all day and night |
Live tables run for the whole of the opening hours.
At the door
On your first visit you sign in once, free, at reception with photo ID; after that you simply walk in.
The gaming floor is for over-18s only. Under Think 25, anyone who could pass for younger is asked for a passport, a photocard driving licence or a card with the PASS hologram.
What to wear: smart casual. The operator notes that standards can vary by venue and event, and prefers long trousers to shorts.
On the floor
- Live table games
- Slot machines
- Electronic roulette and terminals
Around the floor
- Restaurant
- Food served
- Bar
Paying downstairs
Chips are paid for in pounds, in cash or with a debit card, at the table or the cage. Credit cards cannot be used for gambling in Great Britain, and the house gives no credit.
Casino spending never reaches the hotel bill. Buying or cashing chips worth £2,000 or more brings identity checks required by anti-money-laundering law.
The room side
Check-in opens at 15:00 and rooms are due back by 12:00; a minimum check-in age is not published. Korean Grill Kensington and Humphrey’s Bar are the named places to eat and drink, with breakfast in South West 7. There is a gym and room service, but no spa and no pool. Six fully accessible rooms have a step-free wet-room shower, and the six guest lifts announce each floor aloud.
- Brand
- Millennium Hotels and Resorts
- Rooms
- 611, as the hotel states
- Check-in from
- 3pm
- Check-out by
- noon
- Minimum age to check in
- not published
- Eating and drinking
- Korean Grill Kensington · Humphrey’s Bar · South West 7 (breakfast)
- Room service
- Yes
- Wellness
- Spa no · Pool no · Gym yes
- Parking
- Basement car park, charged by the hour band; disabled bays on the drive court (also charged)
- Pets
- not published
- Wi-fi
- Listed as an amenity; free when booking direct
The register places the casino at the hotel’s own street address, while the hotel’s accessibility guide calls it “right next door”. We show both.
Worth knowing
- Gaming floor and live tables: open round the clock, every day.
- Wi-fi is free when you book direct with the hotel.
- The lobby has accessible WCs and a lowered reception section.
Where this comes from
- Register Gambling Commission public register, premises list for Grosvenor Casinos Limited (account 614)
London-Gloucester Road Grosvenor Casino, 4-18 Harrington Gardens, London, SW7 4LJ
- Operator grosvenorcasinos.com — local casino page, Gloucester Road
- Hotel (archived) millenniumhotels.com — hotel, amenities and accessibility-guide pages, via web.archive.org captures from December 2025 to April 2026
Casino details checked on 19 September 2026; hotel details checked on 20 September 2026. Venues change hours without notice, so ring ahead when timing matters.
Grosvenor Casino Gloucester Road is run by Grosvenor Casinos Limited, holder of a Gambling Commission casino operating licence. See the register entry