I like the idea of having meetings both before games and at nights as social evenings (well I'm getting into me stride with the quiz nights now).
The main problem I could see with holding a meeting before a match would be where to have it. The Cocked Hat is usually packed to the rafters with away fans on match days, and while that would increase the potential audience, it might not be condicive to a fans meeting. That's what puts me off going in before games. It's not the biggest place in the world, is it? And I don't think the pubs near Bramall Lane are much bigger either, so you'd probably have the same problem there.
On the subject of the quiz. Would it not be possible to charge for entry, a small fee (say £1) and raise a bit of money for the club. You could even invite anyone else in the pub to enter (as was the case when we went to the Harlequin). It would swell the coffers and make it more cost effective.