Happy hour presents a specific scheduling problem most other events don't: a short, high-demand window where table turnover matters more than almost anything else. Treating it like a normal multi-hour reservation block usually leaves capacity on the table.
Break the window into seating time slots
Instead of one open-ended 4pm–7pm booking window, splitting happy hour into shorter seating slots (say, 4:00, 5:00, and 6:00) lets you set a realistic per-hour turnover cap instead of guessing how many total guests a single long block can absorb. It also gives you a much clearer picture, in real time, of exactly how full each hour actually is.
Set turnover-based caps, not just headcount caps
A simple total headcount limit for the whole window doesn't account for how fast tables actually turn during happy hour, which is usually faster than a full dinner service. A cap based on realistic per-hour turnover for your venue's typical happy hour party (often smaller parties, shorter visits) tends to reflect true capacity far more accurately than an arbitrary flat number.
Reserve some walk-in capacity on purpose
Happy hour crowds skew more spontaneous than dinner reservations — a lot of your busiest hour's guests decide to come in that same afternoon. Deliberately holding back a portion of capacity for walk-ins, rather than allowing 100% of it to be pre-booked days in advance, usually produces a fuller room than fully booking the window out ahead of time.