The Lutrinians are a group formed with the laudable aim of helping people become friends. Even better, this specific event involves a spring walk in beautiful Epping Forest. You'll meet at Epping station at noon, walk, then end up in a pub near Woodford station. Bring your own sandwiches and a friendly heart.
Note: register for free on the website - as for the fee, in the organiser's own words: 'On the day, just give me a quid whenever you feel like it!'