The guidelines/Rules are 4 hours for perishable items at an uncontrolled temperature. (between 40-140) before it needs to be either consumed, discarded, or held below 41 degrees, or above 140 degrees.
If I was to hold at room temp, I would have a time/temp log handy and keep it properly filled out if questions from the local health inspector became an issue. For instance, if I remove the cheese from the cooler at 9:00 A.M. to have it warmed by lunch, I would check the temp, write it down with the time, and clearly show that it has all been used before the 4 hour window expired.