How to say “Are we really going to watch a three-hour film in this freezing cinema auditorium?” in Japanese

In Japanese

こんなに寒(さむ)い上映室(じょうえいしつ)で、三時間(さんじかん)もある映画(えいが)をほんとに観(み)るの？

Konna ni samui jōeishitsu de, sanjikan mo aru eiga o honto ni miru no?