Three men are using Washington Mutual ATMs outside near a parking lot.
A group of friends are getting some money before they go to dinner.
Not every men are friends. You can use Mutual ATMs not only for getting money.
They can use ATM  not only for withdrawing money, and they may not be going for dinner
Although there are three men, it does not mean they are friends.  Getting money out of an ATM doesn't mean they are going to dinner.