The photo below is from a little Mardi Gras performance in a local French restaurant. Because of space considerations, we had just four players, along with a couple of guest vocalists. On the left you can see one of the speakers, and just a bit of the other can be seen near the bottom of the wine rack on the right. The mixer is right behind me, where I could easily turn around a tweak the settings, and the mics for the guest vocalists are on top of the speaker on the left. The mic for my occasional vocals is attached to my music stand and the foam cover is just barely visible above my music books.
The main thing I want to point out is how the speakers are set up so they work at least as much as monitors for us as they do to put sound out to the audience. Since I started performing publicly about ten years ago, I've discovered a lot of people have been traumatized by overly loud sound systems, which sometimes are so loud one can't carry on a conversation, and sometimes actually hurt one's ears they're so loud.
The way they're set up here, if they're too loud, we the players will be the first to know. The sweet spot for the sound was right in front of us and a bit to the right. People siting at tables in that area said the mix was very good. I recorded the gig with the recorder up near the tin ceiling in the corner of the room back above the left shoulder of the person taking this picture. From there the vocals, the only thing amplified, are not as present in the mix. The catch is, had I turned up the sound enough for the mix to be good there, people would have had to yell to converse. So there's never a perfect solution.