I have two: an old GF Tassajara that's my usual commuter/grocery getter with a rack, panniers and platform pedals, and an 80's Takara with a small handlebar bag and platform pedals. I'll grab a backpack if I'm getting anything bigger than the bar bag will hold.
Wrap a strap around the right pants leg, throw on the helmet and gloves, turn on the blinkies and go.
I need to get some pics!