80 movie, the guy goes in a club, people that get thru a hot door come out the same but emotionless

Looking for an old movie, action/horror style

80 movie, the guy goes in a private rich club, club has a hidden door where people that get thru a door (a very hot place) come out as clone but are not same emotionally , he enters the hot gate using a fireproof suit ” astronaut suit ” ..forget the rest