I was in Maidstone, Kent last week and picked up the Winter 2008 Maidstone Town Centre Guide (free) in the Mall shopping Centre beside the bus station.
On Page 30, there's an ad for the Odeon, and a voucher on it which says:
FREE FAMILY TICKET
Bring this voucher along to Odeon Maidstone to claim your free family ticket for an Odeon Kids screening on Saturday and Sunday mornings at 10.15am.
Valid throughout 2008. T&Cs apply, please ask in cinema for details.
Tel 0871 22 44 007.
I know it's location specific (and expect a load of cold votes, but I don't give a toss!), but anyone living or visiting the area might benefit from knowing that the voucher is there, as I suppose a lot of people don't bother picking up these brochures.
Perhaps similar offers in other cities?