Yes—there are dedicated event-sales packages made for this. Two options mentioned were Express Digital Darkroom and the Krasbit Chameleon series; Express Digital Darkroom was noted as a major player in this space.

That said, your biggest bottleneck may be workflow rather than editing software. A few practical ways to speed things up:

• Use a separate display or kiosk that continuously shows images so customers can browse without tying up the print station.
• Pre-print thumbnail sheets/contact sheets with clear image numbers so people can decide before reaching the counter.
• Keep a simple numbering system so staff can quickly retrieve the selected file on the main computer.

If budget allows, a custom touchscreen kiosk could add a smoother self-service experience, but that’s likely a higher-cost solution.

So the best answer is: use event-specific sales software if you need integrated viewing/ordering, but also redesign the customer flow with a separate browsing station and numbered thumbnails to remove the queue bottleneck.