Do you think people who live together,or who often hang out together will influence each other?

你认为住在一起的或是经常一起出去玩的人会相互影响吗？

其实相当于Do you think THAT people who live together,or who often hang out together will influence each other?

who live together,or who often hang out together是修饰people的

你认为人们一起生活或者经常一起居住将会互相影响吗?

这个是定语从句

Do you think people who live together or often hang out together will influence each other?
你认为住在一起或经常在一起的人会相互影响吗？

Do you think people who live together or often hang out together will influence each other？
你认为那些生活在一起的人或者经常黏在一起的人会互相影响吗？

你认为住在一起或经常在一起勾搭的人会相互影响吗？
是定语从句.who live together做 people 的定语.