I have a lot of pictures similar to this because I like to visit craft beer tasting rooms. Obviously the light levels in a bar can vary a lot but many of my shots use ISO 1600 to 3200*. I often use a 28mm lens because it's small, but you could just as easily use the DA 18-55 that probably came with the camera. I often use f4 to f5.6. I know that with that lens I can use 1/30 sec. without camera shake, even down to 1/4 sec. sometimes. (That's not a fixed number for everyone, so test it yourself.) I probably have a hundred shots with settings close to that.
*With the K50 and those ISOs, you'll see some noise in an unprocessed shot. If you are shooting JPGs, the in-camera noise reduction settings can get rid of it. There is a balance between ISO noise and detail but 3200 should look OK, 51200 is more trouble.
In this one I used 1/10 sec. on purpose to blur the moving bartender.