venchka
Veteran
I would have to say the M7 as it's AE is very accurate in low light ... often it can be an environment that is fairly quiet also so the M7's near silent shutter also wins out here! 🙂
The worst in my opinion would be the M5 ... the match needle metering is extremely difficult to use in really poor light as the shutter speed readout at the bottom of the frame becomes almost imposssible to see.
Bigfoot is hurt. Tmax p3200. 50mm/2.0 D.R. Summicron. Rodinal stand. After dark at Town & Country. Houston, TX.

http://gallery.leica-users.org/v/venchka/1+hour/T-C+Nocturne/
Several more. Night or indoors in the dark. M5.
http://gallery.leica-users.org/v/venchka/Houston/?g2_page=1