It says "ask Ellie for plus ones" on a party invitation. WHAT DOES THAT MEAN?!

Question: It says "ask Ellie for plus ones" on a party invitation. WHAT DOES THAT MEAN?
Answers:

Plus ones...means you can invite an extra riend to the party who isnt already invited.
So pick someone, then ask Ellie if she'll let her/him come

It means if you want to bring a date, ask Ellie if it's OK first.

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It says "ask Ellie for plus ones" on a party invitation. WHAT DOES THAT MEAN?!

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