The ceiling looks dark and it is covered with multicolored lamps; problematic for bounce flash. They probably wouldn't allow you to use it anyhow. Some of the blur I see is subject motion (#1) and it is appropriate for the subject. Very nice. #2 looks like the near hand is in focus, the knife a little soft and head OOF. Spot Reading could help that. #3 has two subjects so you need a smaller aperture for greater DOF. Your camera is built for low light shooting. Back illuminated sensor, no low-pass filter. High resolution and clarity. It's a good box. So here is something to try: boost your ISO to 15000 and don't worry about the noise; go higher if you need to. Shoot at f4 to 5.6 based on available light, and use 1/300 or higher shutter speed. Pick up more brightness in post if you need it. You can pick up a couple of stops in Lightroom without screwing up the balance. Correct light balance in Post. Give it a try and send a PM to let me know how you did.

Looks like the contrast range is too high for the camera to handle in some of the shots. Sky is burned out and shadows are blocked up. Usually, if you need to have detail in both shadow and bright highlight, you would shoot an HDR shot. In these photos I don't see anything in the sky that adds to the picture so cropping it out when you shoot would be a good solution. Spot metering is great if you need perfect exposure of a spot. Center weighted or matrix mode is more appropriate for these. Take your ISO off automatic and set it as low as you reasonably can. For this kind of photography ISO 100 or 200 would yield a useable shutter speed. about the only time I float(AUTO) the ISO is when I shoot in manual and light is changing a lot. Not a good idea to use Auto ISO and another automatic exposure setting.