The face-to-face convention business is being threatened by unconferences, which are inspired by the Web. Unconferences transform the boring and predictable business gathering into hybrids of teach-ins and jam sessions. They are attracting hundreds of participants in big cities, and unlike traditional and costly conferences, they are completely unstructured. No agendas are determined until the event opens. Everyone who comes is a potential speaker, and those who do not speak can still contribute via posts of online photos, blogs, podcasts, and video clips of the proceedings. Attendance at unconferences is always inexpensive and often free. Many such meetings are occurring in some interesting sectors. There have been three unconferences in Paris involving banking and finance, while the Toronto Transit Camp offered a day-long brainstorming session about how to improve the city's public transit system. ArtCamp in Vancouver had a session on moving images, while Wine-Camp, in addition to wine-tasting, focused on how nonprofits use technology. It was held in a vineyard in the foothills of the Sierra Nevada mountains in California in the spring of 2006. Such "camps" represent one of the fastest growing types of unconferences. Supporters of these gatherings compare them to other crowd-driven movements that present a threat to high-profit business models. Unconferences are expected to completely eliminate staid, traditional and established conferences, says Doug Gold, who operates Mass Events Lab, which produces several unconferences.