ambientar

ambientar
ahm-byehn-tahr'
to set; to liven up; to decorate
Examples
1. Mi abuelito ambientó la sala con luces y velas.
My grandfather decorated the living room with lights and candles.
 
2. El DJ ambientó la fiesta y amanecimos bailando.
The DJ livened up the party and we danced until morning.