Is a phrase employed by men who enjoy the company of other men. It means,
literally, the more people who are around the happier the occasion
will be. However, scholars extrapolate that people is a stand-in for the word 'men.' Therein the phrase is really means that an occasion is made more entertaining by the increased
number of men in attendance. Clearly, the speaker of such a phrase is excited by the additional men who are around or near him.