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A detective comes to the table of Eli and Melinda.
Detective: Excuse me, are you Eli James?
Eli: And friends. What does he mean?
Can he mean the many people who visited him an hour before that?
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"And friends" might just refer to anyone with him, in this case - to Melinda.
Comments  
Hi, Madhulk. It's quite hard to figure it out without context. I guess he meant, jokingly "Yes, I'm". Just a joke like :"There are me and my company." implies "I'm the whole here and there is no one else". It's my opinion.
 Annvan's reply was promoted to an answer.