What does it call?
There are many computers in the room, running for commercial by business man, age below 18 is forbidden to get in for some countries, should I call it cyber bar, or computer bar, or other official call?

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The terms you are looking for are 'age restriction' or 'age limit.' Neither 'cyber bar' or 'computer bar' make sense in English.

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cybercafé or Internet café

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Thanks for correcting "my question"

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"What is it called?" This needs to be your question.