using the table format, how to filter on words

My table looks like this:

Place1 Place2 Place3 ...

A A C

B A A

C C B

C C A

A C A

I want to remove all rows not containing say 'B' and ending up with

Place1 Place2 Place3

B A A

C C B

strcmp(table.Place1,{'B'}) % works in one column

strcmp(table(:,{'Place1','Place2','Place3'}),{'B'}) % returns 0