Wiktionary
vb. (context idiomatic English) To accompany someone in a passive manner, or to take a relatively passive or detached role in a project or group activity.
Usage examples of "go along for the ride".
His passengers had to go along for the ride, no matter where it led.
Anyone else could go along for the ride, unless he was too old to jump.
All she could do was drown herself in the radio and go along for the ride.
I moved us off the grave, so that that heaving, shifting earth settled around him, without us having to go along for the ride.
Roy said, not knowing what all this was leading up to but willing to go along for the ride.
Now why we all have to go along for the ride with your boy, Berkfield, is beyond me.
My guess is that Luke decided to go along for the ride, maybe on the spur of the moment.
With a little practice I discovered I could shift to Shari, actually thinking in that language, and just tune out and go along for the ride.