What sport/stadium has the highest spectator to player ratio?

Watching rugby sevens in the Olympics makes me wonder what single event, sport or venue has the highest amount of spectators to the lowest amount of players. Is it a giant stadium watching an 11v11 soccer match, is it 69,000 watching 7v7 rugby, is it a full stadium for 1v1 tennis, or maybe even and full football stadium watching 5v5 basketball in March madness. This would exclude television viewers as that would be a whole different debate.