You could check out the Bike SA free rides programme....refer to their website for more information
three in the morning and three in the evening
You could also check out the rides starting from Star Cycles at Elizabeth West.
Looks like civilised hours, too.
Ditto for Star Cycles.
It's nearly complete, just waiting for the paperwork to come back .
In addition to the Mon Wed Thur rides at Star there are also rides on Friday and if you join the Monday ride you'll almost certainly find riders to get out on a Tuesday
Should have mentioned that if you have recently retired this is an excellent group though I would start with the Monday group
Andrew Watts and I are meeting at the Buffalo Glenelg 10am Wednesday 01AUG. At a gentle pace, route to decide on the morning. Plenty of time for coffee.