Citywide

An event large enough that a single hotel cannot house all attendees, so rooms are blocked across many hotels in a market, often coordinated with the local convention and visitors bureau or a housing bureau. Citywide conventions drive peak demand across an entire city, which is why they frequently show up as blackout dates in unrelated groups' contracts. For the organizer running one, the challenge is tracking pickup, cutoff dates, and attrition across dozens of separate contracts at once — each hotel with its own terms — rather than a single block. Per-night visibility across every property becomes essential, because attrition is calculated hotel by hotel: a shortfall at one property is not offset by strong pickup at another.