The most commonly found kind of hamster in pet stores is the golden hamster. There are over 30 color varieties of golden hamster, including cream, cinnamon, and white sepia variations.
Golden hamsters are solitary animals in the wild.
These should be kept in separate cages when adults or else fighting will occur. Dwarf hamsters are usually the most sociable kind of hamster, and you might be able to keep a few in the same cage.