Organizers of HUBweek, an innovation-themed festival designed to highlight Boston’s reputation as a, well, hub of learning, medicine, technology, and the arts, gathered for a launch party Tuesday to talk about the inaugural event, scheduled for Oct. 3-10. HUBweek is a joint venture among MIT, Harvard University, Massachusetts General Hospital, and the Globe. Events will be held throughout Boston and Cambridge, including hackathons, lectures, interactive art exhibits, master classes, and cultural performances. Tuesday’s gathering at Liquid Art House included reps from the festival’s four founding partners as well as folks from startups, the tech sector, and arts organizations. Among those attending were Tonya Mezrich, Peter Slavin, David Snowden of Natixis Global Asset Management, Tim Zue of Fenway Sports Group, Larry Cancro of the Red Sox, independent curator Pedro Alonzo, Patrick Lyons, Linda Whitlock, WBUR’s Charlie Kravetz, and HUBweek creative director Jeff Grantz of Materials & Methods.