All great ideas, jloden! I did not have a chance to use them last night, but here are a couple of shots, and fortunately I had better ambient lighting for a couple of them.
ISO 6400, f 2.2, 1/300sec, no flash, XF23mm
ISO 6400, f 2.2, 1/350 sec, no flash, XF 23mm
ISO 6400, f1.4, bounce...