I know Tastecard deals are usually colder than the Arctic but for once this deal seems worth considering.
Join for 3 months for just £1 and get two Odeon tickets free. I guess this is for new members only, but probably works with different e-mail addresses. just remember to cancel well before the 90 days are up to ensure you are not auto renewed at full rate
Go via Topcasback or Quidco to get £1 cashback making it free!