What factor makes cities more likely to host large conventions?

A city with enough hotel rooms near the convention center is crucial for hosting large conventions because it significantly impacts the convenience and accessibility for attendees. When participants travel to conventions, accommodations are a key consideration; they need easy access to their lodging after attending sessions or events. A sufficient number of hotel rooms ensures that attendees can find suitable places to stay, reducing potential logistical challenges and improving the overall experience. Furthermore, it often influences a city's attractiveness to event organizers, as hotels that are close to the venue allow for straightforward transportation and enhance networking opportunities for participants.

While adequate parking facilities, a large airport, and a well-established local government are also important factors, they primarily serve specific needs—parking for local attendees, air travel for distant participants, and administrative support for event management. However, the immediate need for lodging accessibility is foundational to the successful planning and execution of any large convention, making this factor particularly pivotal in the decision-making process for event planners.