I dont know if this has any relevence but FWIW there was a regular Worldwide session held on Paltalk for a couple of years, which was a session that people indicated their desire to play and took a turn when it came around, the only real rule was "no recordings" so all performances, playing and/or singing were LIVE. the session regularly had Australians, New Zealanders,UKers and USA ers on both coasts taking part so that ,and happened in "real time"even though it was at different times of the day in each place, Many of us participated and it sounds similar to what you may be trying to organise, It was great fun to be involved in, I am sure more details would be forthcoming if required.