The venue consortium revealed the four London spaces are 110 Rochester Row, 20 Cavendish Square, The Athenaeum Hotel and 195 Piccadilly - the home of Bafta.
Launched this month, 110 Rochester Row is a new, purpose-built conferencing venue between Pimlico and London Victoria stations. It is owned and operated by registered charity Healthcare Financial Management Association.
20 Cavendish Square is the home of the Royal College of Nursing. Located to the north of Oxford Street, the venue has 14 meeting rooms, with the largest capacity room accommodating 200.
The 164-bedroom, five-star Athenaeum Hotel in Mayfair has capacity for events of up to 100 people. The hotel’s three meeting rooms – all with natural daylight – can be booked together before delegates can make use of the hotel’s other facilities including a vertical garden and spa.
195 Piccadilly offers five rooms for corporate events, private dining and weddings.
Jonathan Morris, TWC’s membership director and commercial director at No.11 Cavendish Square, said: "Since its establishment in 2003 The Westminster Collection has gone from strength to strength with a growing portfolio of culturally interesting venues in the city of Westminster.
"The range is wonderfully diverse and there’s something different and special about each one to suit organisers' wide ranging needs."
He added: "By being part of a leading venue consortium, members benefit from the partnerships formed with business organisations, trade bodies and associations which provide a network for boosting sales leads and sharing referrals."
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