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Is it possible to use the second article A?
I mean,"i went to a restaurant and A cafe"
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If they are two separate premises-- which by all logic and lexes they should be-- then yes, use the second 'a'-- it is preferable.
Comments  
I went to a restaurant and a cafe.

Is it possible to use the second article A?
I mean,"i went to a restaurant and A cafe"

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Absolutely!