[Eugenia Gabrielov]

Here are a few things you could do:

- Email each team again, or call, and ask for feedback on what would make them more interested in attending the event. Ask open ended questions, but also ask them to comment on specific things you can change: timing, venue (iffy, but possible?), organization, etc. One big factor is cost - maybe they can't afford it?

- Stress that it is the only off-season event nearby, and that it will give students a chance to do robotics who might not be able to afford to fly to a US regional or take time off of school for one.

- Directly contact organizers of events like IRI, Ruckus, and other popular US off-seasons. See if they can provide insight onto your situation.

Finally - my best solution

Hype it with your friends on the teams. Or make friends to hype it with. Word of mouth goes a long way, and if you get team members excited they may convince the rest of the team and their leaders to come!