On a serious note this a bad idea. You will get some tables taking a lot longer than others, therefore people still in hanging around doing nothing. Also the whole tourney will take longer.
Surely this is good for a pub? Less poker and more drinking is what they want.
If you have tables of 9 why not have position 4-6 and 7-9 all go in to their own separate comp for some kind of booby prize? Obv depends on numbers, maybe just have the top 3 comp and another for the rest.
Make the structure really fast so that the first round lasts no more than 60 mins. Final needs to be the same. Try to get a couple of breaks in so that players can go to the bar and get slammed.
If they want a serious comp with a good structure tell them to go to DTD.