There are many cycling clubs in east Kent catering for all types of riders.
If you'd like to join a club, the best places to start looking  are Cycling UK's website and British Cycling's website.

https://www.britishcycling.org.uk/

​https://www.cyclinguk.org/

There are also some more specialist clubs which cover a larger area than east Kent or are bit outside it, for example:

• Forty Plus Cycling Club
• Kent Velo Girls
• Potterers Club 
• Tricycle Association, South Eastern Group 
• Tandem Cycling Club of Kent 
• University of Kent Bicycle User Group
• University of Kent Cycling Club
• Veteran Cycle Club, Kent section.