I was invited to speak at FIRSTFare in Portland. This was a local event. The event gave me a free ticket, and I was not paid to speak. The event did not pay for my travel and accommodation. My employer did not pay my travel expenses, and I was a student when I spoke at the event. It took me 6 hours to prepare for my 2 hours speaking slot, and I had a great time. I'm a girl who has been speaking for 2 years. This was a not for profit event. Also, I offered to present. Tickets were free to everyone. No one came from particularly far away, so the only travel costs were the gas to drive there and back, which were minimal. This was not a particularly large conference: very based in one specific robotics community. There were a few hundred attendees.