I'm in (seeing as I suggested it)
It's a quick game - should only take 15 to 20 on bsw irrespective of number of players - I'd recommend the tourament is structured with more than 2 players per game - 4,5,6 plays well.
No. of games will depend on total number of players - e.g. lets say we get 24 players, then we could have 4 games of 6 (always apply rule of "no show, no go") then top 3 from each go through - 12 players qualify for semis, and then 6 for the final. Seven games in total.
With 2 players per game it's 12 games, then 6 games, then a final with 6 - or maybe 3 more games and a final with 3? - either way it's a lot of games - either 19 or 22 games, which from experience wil take a looonnggg time.
Just a thought.