Hellboy44, My guess is we are not very different in venues..

Mostly I play in a trio, at several different ocean side venues..Some are out doors(on boardwalks or street parties).The audience is hard to measure (anywhere between 1,000 to maybe 5-6,000 people)..
These are strictly mono sound systems..On the boardwalk the speakers are spaced every 40 feet or so...usually around 6-8 speakers..

Our street parties[closed off streets next to the ocean..we are on a raised stage and use our typical Yorkville set up..running in mono. This system covers several blocks with sound..I have people say they heard us 5 or 6 blocks away as if they were sitting in front of the stage...The Yorkvilles cover a large area[2- NX520p's and a Sub woofer]..

Our shore crowds are mixed...we have teens- seniors..Our music is usually dance music from the 60's and 70's..)

Our club dates average around 200-250 people..many I stay in stereo, some we go mono..Especially the outdoor clubs(mono).We have some larger club dates with over 300 people and these are also mostly mono..
Our range of music is material from Big Band era, 50's doo wop, the 60's and 70's and some top 40..

My solo work is a little different, audience is usually around 150 people..I do mostly 40's , 50's and 60's material ( Presley, Vinton, Anka, Humperdink, Jones etc)..The vast majority of my solo jobs are stereo[currently using my trusted Roland CK 100's)..

BTW: it only takes a push of a button on my Mackie mixer to switch from stereo to mono..so if one works better than the other..easily adjusted...