They want to fit in with friends or certain groups.

My feeling is that he'll fit in with you very well.

I really did try to fit in with your world.

And from there, how do you fit in with the action?

See if he fit in with this society, instead of his own.

Even if they did, they'd never really fit in with human society.

Did it fit in with other things he had learned?

The family still has to fit in with the job.

Well, maybe they just wanted it to fit in with the area.

How well do you fit in with his or her friends?