Halloween postcard: "be the head with me"

This is a colorful Raphael Tuck & Sons' "HALLOWE'EN" postcard. It appears to have been an intracity mailing in San Jose, from John & M.E.W. to Miss Carol [?] Hyde. The postcard was stamped, but there's no postmark. So it was either hand-delivered, or never delivered at all.

In the illustration on the front, there are two cheery-looking children with a basket full of apples. And then there's a boy with a knife who seems to have been sitting around and carving faces into pumpkins. He wants his friends to see the fine work he's done.

And then we have the message on the back of the card, which I believe was written by M.E.W. on behalf of John:

Please come to my party Friday afternoon from three to five-thirty and be the head with me.

JOHN

No present, please M.E.W.

Am I reading that correctly? "Be the head with me"? There are no other cursive B's for comparison, so I can't be 100% sure. Any thoughts? And if it's "be the head with me," we shouldn't find that alarming, right? Right?