Between 1997 and 2016, Davis chaired the London Mayors' Association, an organisation comprising the current and former mayors of the 33
London Boroughs, which was originally founded in 1901. Davis turned the then moribund LMA into a successful and widely recognised group. He was a director and trustee of the
Open Air Theatre in
Regent's Park from 1986 to 2019, and chairman of the Board between 2009 and 2019, during which time the venue won several theatrical awards, including
Oliviers. Together with his fellow councillor Lady Flight, and other colleagues, he founded the Sir Simon Milton Foundation, a registered charity which was established after the death of Davis's partner Sir Simon Milton (lately Leader of Westminster Council, Chairman of the
Local Government Association and Deputy Mayor of London and Chief of Staff to
Boris Johnson as
Mayor of London until Milton's death in 2011). The purpose of the charity was to continue to support Milton's priorities to address loneliness and isolation among older persons, and to support young people into work through supporting their educational needs. The Foundation now runs Silver Sunday, a day held every October to support older people in meeting others by attending one of over 1,200 events throughout the country. The Foundation has also sponsored the establishment of the Sir Simon Milton Westminster University Technical College in Pimlico, and has distributed a number of bursaries and grants to students in financial need, including at Davis and Milton's own Cambridge College, Gonvile & Caius. Davis is currently Deputy Chairman of the Foundation. Davis is a trustee of the Savoy Educational Trust, a charity established by the Directors of the
Savoy Hotel, which provides financial assistance to hospitality colleges and schools. He is also a trustee of Mousetrap Theatre Projects, a charity that helps young people, including those with disabilities, to attend West End theatre shows at a low cost. In 2007, Davis helped establish the Westminster Guide Lecturers' Association, which awards authorised green badges to tour guides expert in the history of the City of Westminster who have passed an exam. Davis was its first Honorary President between 2007 and 2017. He has been the International Goodwill Ambassador of the
London New Year's Day Parade since 1998, and between 2003 and 2018 organised the Westminster Council entry in the Parade, winning the Best Borough Entry seven times. He also served on the Board of the New West End Company (the Business Improvement District for Oxford Street, Regent's Street and Bond Street) between 2000 and 2011, and again between 2017 and 2018. ==Honours and awards==