One of Ian Fleming's own gadgets he was seen with frequently was a seat stick, being a walking cane with a handle that folds out into a stool seat. You can go walking and never be in need of a bench, quite a conversation bench. Charming.
Swaine Adeney Brigg Supercrook Seat stick £105.00 swaineadeney.co.uk
Lincoln Crook-Handled Seat Stick $49.95 amazon.com