Visit us at (the) booth 24, (the) room 56 etc. It's wrong, but why?

grammar usage

I know that "the" is wrong here, but I can't explain why it's wrong to my friend here, and I have trouble formulating a google search to find some descriptive "rule" or something. Help please?


Because "booth 24" and "room 56" are acting as proper nouns (names). Just like you would say let's meet at "ABC" , where "ABC" is the name of a restaurant.

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