I was invited to speak in London. This was a local event. The event gave me a free ticket. The event did not pay for my travel and accommodation. My employer paid all of my travel expenses, and I was working while speaking at the event. It took me 4 hours to prepare for my 60 minutes speaking slot, and I had a mostly good time. I'm a man who has been speaking for 10 years. This was a not for profit event.