Jos Brient, who runs the gallery with his brother Nick, will be taking part in a community fundraising day for JRHYS, a charity set up in memory of James Ross Hunter.
"At the age of 18 James Ross Hunter with a bright future and ambition sadly lost his life to knife crime in June 31st 2014.
His attempt to stop a friend from being attacked resulted in James receiving the fatal blow.
Mother Collette Hunter has set up the James Ross Hunter Youth Support project to highlight this growing problem within our youth and encourage them to choose another path that leads to positive living."
There'll be lots of different activities during the day (see the poster).
Where? 111 Wells Park Road, Sydenham SE26 6AD. .