Thanks for the additional details. I suppose the usefulness of this depends a lot on how many positions you're looking to fill, and at what level of skill. It sounds like you're using it to fill multiple entry-level positions, where it makes more sense. I suppose the people there know that there are multiple positions, so don't feel quite so much like they have to compete with everybody else to get hired. And if it's relatively entry-level, then maybe most of the candidates don't have full-time jobs already to be disrupted at, and would appreciate help if they didn't get hired?

I admit that I tend to think of things initially in terms of myself and what I would be looking for, more of a single position for someone with experience and marketable skills, and currently holding a full-time job. There's probably some room for improvement in the process for that too, but I don't think the open house idea would be a good fit.