Theatre actors have one important additional trick for any venue, which is to enunciate your consonants clearly and crisply. Even someone with a very soft voice can be heard long distances and over noise because the human mind makes sense of words through the consonants, not the vowels or the underlying tone. The consonants, being mostly percussive, also cut through noise. In crowd scenes where specific conversations have to be heard, that is standard direction. Probably will help a little in pubs too.

yours, Peter T.