The charming walled garden of Fenton House, which dates to the 17th century, will be a captivating setting for cocktails: they'll be themed to the periods of London Small Historic Houses (London Shh) member properties, which include everywhere from Dr Johnson's House and Handel House to Ernö Goldfinger's modernist 2 Willow Road, spanning an intoxicating four centuries. If you're not too squizzy - and perhaps if you are - there's going to be croquet too.
Note: there's no car parking space at Fenton House.