In the hospitality industry, a guest who arrives at a hotel without a prior reservation is officially called a "Walk-in." Because walk-ins haven't pre-booked, they are often charged the "Rack Rate"—the maximum, non-discounted price for a room. Handling a walk-in requires the front desk agent to quickly check current occupancy and "real-time" availability. From a business perspective, walk-ins are a double-edged sword: they help fill "last-minute" gaps in occupancy that might otherwise go unsold, but they also bypass the chance for the hotel to "vet" the guest or secure a deposit in advance. In many modern hotels, especially in high-demand cities, "walk-ins" are becoming rarer as most travelers book via mobile apps just minutes before arrival, which technically converts them from a "walk-in" to a "last-minute reservation" before they even step foot in the lobby.