Criminal Sentence 94: "A part" vs. "Apart"

From the same article I quoted earlier (the wedding planning article):

"Ensure your guests are able to share and be apart of the activities."

This sentence suggests the guests be "apart" (from) the activities, which is the opposite of what the writer intended ("a part"). "Apart" with no space means away from. "A part of" means included in.

I am glad you are a part of this blog audience.
I hate it when we're apart.