Thanks Don for your reply
Sadly it is difficult for Europeans to fly with Vatsim in the USA, not only because of the time difference.!
I disagree, But not from any obvious reason.
I have personally seen the other side of the issue: Where I have been on and controlling at times when those in Europe are on, and few of them have come to fly in the US. Case in point: for a period of a few years when I was working the swing shift, I came on and controlled overnight in the US (11pm to around 4am, GMT-8). There were times when the US is completely asleep, Europe is on, and pilots over there rarely came to fly, unless they were trying to fly some huge flight overseas. There were also times when those from France, Germany, Sweden, and others completely packed the US West Coast, and were shocked to see the noise abatement procedures that normally aren't used during the day in the US (they didn't go into effect at KLAX until 9pm LT), as they were able to experience landing and departing from LAX in different ways than what they normally see or hear.
Each time ATC was on - and should be emphasized - the traffic was built organically, not through anything that was scheduled through any booking: ATC, pilot, events, or otherwise.
So when we have had controllers available regardless of time difference, no booking, on for multiple hours of the night/day, we have had both nothing on a thin night, or have been heavily packed, when the locals to the US are asleep. None of that required scheduled ATC booking, as ATC isn't here for the pilot's beck and call just because pilots want ATC on demand.
BL.