let us look at the way it [virtual] could be improved.
I would suggest ideally two people working as co host one very conversant with the technology , the other experienced with running good singarounds, this means imo knowing your regulars and their repertoire,not just going in any old order,but making sure there is balance of repertoire, having a stronger performer to go after a beginner etc, balnce between unaccompanied guitar concertina etc.
in real life singarounds, imo the order of singers is so important [of course there will be a few unknown quantities].