Miss Manners: Social event start times can be fluid. How do I arrive not too early, but not late?

Miss Manners addresses the fluidity of social event start times, providing guidance on how to avoid arriving too early or too late. She notes that appearing at a house party while the host is still in their bathrobe is generally frowned upon. The advice explores the ambiguity of acceptable arrival windows, questioning whether ten or fifteen minutes before the stated time is appropriate, or if being fashionably late is the preferred standard for guests.