Ooh, I'll bite!
Ditto the local discussion series-- check out university departments that interest you, business incubators, museums, galleries, nature conservancies, cultural societies, churches, etc.
Creative activities-- glass blowing, ceramics classes/drop-ins, cooking classes, robotics labs, maker spaces (DH and I love building furniture together), improv
Learning something new together-- a new language together, massage classes, photography, sailing, etc
Do a sport together--rock climbing (bonus points because you can check each other out!), racquet sports, cross country skiing, kiteboarding, parasailing, etc. Choose something for which having kids around would interfere with your enjoyment/learning.
This is a favourite of DH's and mine: email each other interesting articles during the week prior to your date, then go for a walk somewhere scenic and discuss them.
Engage in climactic pursuits in public places. Not in a car.
