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Step one: define the real headcount
Start with the number of people who will be in the room at the busiest moment, including guests, performers, crew and staff. Venue listings often quote a single capacity figure, but the number can change with the setup. Ask which arrangement the figure assumes: standing, theater seating or tables. For example, a planner hosting an album launch for 120 guests plus eight crew should treat 130 as the working figure, then add a margin for late arrivals. Write that number down before opening any listing, so every venue is judged against the same requirement.
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Step two: match layout to the event format
Capacity alone does not tell you whether the room works. Compare how each layout supports what happens on the night: sightlines to the stage, space for a bar or merchandise table, clear aisles, coat storage and a path for equipment. In the album launch example, a standing room of 200 may suit the crowd better than a seated hall of 180, because guests will want to move and talk. Request a floor plan or visit in person, and sketch where the stage, sound desk and entrances would sit. Note any pillars or low ceilings that block views.
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Step three: score and confirm in writing
Build a simple table with one row per venue and columns for headcount fit, layout fit, access, sound, price and available dates. Score each from one to five, then discuss the lowest scores with the venue directly. In the example, the planner might rank a club first for atmosphere but drop it after learning the load-in is up a flight of stairs. Once a favorite emerges, ask the venue to confirm capacity, layout and any limits in writing, including fire-safety figures. Keep that message with the booking records for later reference.