Be/go along for the ride: to join in an activity for pleasure but without being seriously interested in it 凑热闹,随大流
Some of the group are not really interested in politics---they're just along for the ride. 这一群人里有些人并不是真正对政治有兴趣---他们只是随大流而已.
The guys all went to a football match, and I went along for the ride.
I don't know anything about football. I'm just going along for the ride.

Take sb for a ride: cheat or deceive sb 欺骗,愚弄(某人)
If you've paid 6,000 pounds for that car you've been taken for a ride! 你要是真的花了600英镑买那辆车,你可是挨宰了!