Our friends from the West Kent CTC have the answer if you like to plan your cafe stop ahead, including map reference and opening hours . I've added the link in a sticky in the Routes section aswell.
[url]http://www.westkentctc.org.uk/Pages/Various/Cafe%20list.pdf[/url]
If you know your grid reference then this looks like it'll give you a bit of info too. Need to register and log in but it also covers B&Bs, camping etc.
[url]http://www.cyclestops.co.uk/index.php[/url]