Is it possible to borrow someone's orange sim card, text that 241 thing in from your own phone, give them back their sim card and then just show your own phone to the cinema guys?
If so you could set up a little stall charging £2.50 to all non-orange customers for them to have two tickets for the price of one. Given tickets are now a fiver each it sounds like a deal, and you just have to pay the 10p sms charge.
Or does orange do something silly like restrict the number of times you can sms in on one wednesday?
Anyone want to man the stall with me?
Dan