vector<vector<string>> room[10];

This code would create an array of 10 vectors of vectors of strings.

I think you want this:

vector<vector<string>> room(10);

This would create an vector of vectors of strings, instantiated with 10 elements.

vector<vector<string>> room[10];

This code would create an array of arrays of arrays of strings.

I think you want this:

vector<vector<string>> room(10);

This would create an array of arrays of strings.