Hotel rooms often have beverage coolers or drink fridges that resemble mini fridges, but they aren't built for long-term storage of takeout or leftovers.
The FDA recommends a maximum fridge temperature of 40 degrees Fahrenheit for storing food. Drink fridges or beverage coolers tend to run between 41 and 65 degrees Fahrenheit.
This means they are outside the safe range for storing food. These coolers are generally more energy-efficient than refrigerators, which is why hotels take advantage of them.
If you want to keep your food cool, check with the front desk to make sure your mini fridge is an actual fridge or if you can adjust the temperature of your mini fridge.
When all else fails, ask for a champagne bucket full of ice and stick that in the fridge with your perishable items to keep them cool.