St John’s has a well-equipped café area which can seat over sixty people. The café is open between 10am and noon every Wednesday and Saturday selling hot and cold drinks, and a variety of home made cakes and scones. All profits go to charity.  At the Wednesday and Saturday café there is also a stall selling a range of bric à brac, DVDs, second books etc, and there is a welcome counter where you can purchase souvenirs and concert tickets.

During term-time the Wednesday café is staffed by pupils from Marshfields school, and during school holidays it is staffed by a different charity each week.  The Saturday café is mostly staffed by volunteers from the church.

The café is also open before Tuesdays Till Two talks and concerts, when it is usually staffed by The Green Backyard pop-up café team.