Do you ride a tandem?
Why not join the Tandem Club?
see:-
http://www.tandem-club.org.uk/
There are various regional groups who organise local rides.
I sometimes join the Thameswey branch, who meet for rides on the 3rd
Sunday of each month. Very easy going, about 30 miles with a pub lunch.
Very enjoyable. The rides often start and finish at leaders houses in
Reading, Wokingham, Abingdon, Yately, Fleet for example (mainly
Berkshire and Oxfordshire).
Look at the website, there might be a group near you.
Bob.