Well our B737 FCTM says don't taxi with one engine, but I see guys (mainly from Nth America) doing it, and I can't see how the benefits can possibly outway the negatives. To extrapolate; many years ago in an Indonesian carrier, they used to shut down both engines and "glide" into the gate. It would have been fun to subteley apply the brakes from the right seat prior to arrival at the gate.
If only I new then what I know now