Croydon movie fans are eligible for discounted tickets at the Secret Cinema.
Regular tickets sell for up to £45 a ticket, but residents can grab them for just £20.
The Secret Cinema concept involves interactive performances being held in unusual locations and includes costumed actors ensuring everyone is involved in the fun.
Croydon's secret cinema is housed in a building used as Gotham City Hospital in the most recent Batman film.
The former BT building in Wellesley Road has been re-branded as the HQ of the fictional G.O.O.D. Corporation, and guests are fully immersed in the atmosphere of the film, the title of which is kept under wraps even after tickets have been bought.
Councillor Jason Perry, cabinet member for planning, regeneration and transport, said: "Events like this are just what we love to see in town.
"They help reinforce the fact that Croydon has a huge amount to offer to promoters and audiences alike.
"It’s great to hear that local people can now get to sample this unique performance with discounted tickets."
To access the hush-hush secret ticket link, go to croydon.gov.uk/shhh.
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