Yes, no problem. If the temps are sub zero at some point the battery warmer may come on, it doesn't draw much but it's to protect the battery and will drop your SOC% a point or two.
The nice thing about a Leaf(post '12) is it starts putting out heat in less than a minute, because it doesn't have to first warm up the engine, then antifreeze, post '12 Leafs in frigid temps all use a direct coil to air heater. The older Leafs used an antifreeze loop and newer Leafs with a heat pump use that down to about the teens after which the heat coil kicks in.
If you had even a simple 120v outlet at work, that would help but isn't necessary unless you need the charge.
2012 SL purchased used 2/'16
2013 S w/QC purchased new
Juicebox Premium 60a L1/L2 EVSE, Ebusbar 16a L1/L2 EVSE
'12 EVSEupgrade'd 20a L1/L2 EVSE, '13 EVSEupgrade'd adjustable 6-20a L2, 6-13a L1 EVSE
Zencar 13, 20, 30a L1/L2 portable EVSE
GE Durastation 30a