Answer: Elle aime sortir avec des amis.
Explanation: Here's a good way to remember the ending for er verbs:
E
ES
E
Ons
Ez
Ent
Obviously in a french accent to make it more memorable (at least for me)
and the reason why sortir isn't conjugated is because it has to stay in the infinitive (its base state which would be sortir) because there is a verb that was already conjugated earlier in the sentence