The phrase "cool place" is an informal expression used to describe a location or environment that is enjoyable, relaxing and pleasant. It could refer to any place where people feel comfortable, happy and at ease - such as a trendy cafe, a beautiful beach, a lively concert venue, etc. The term "cool" can also imply something stylish, modern or unique, so it might be used to describe an interesting restaurant with a funky decor, for example. Ultimately, the phrase is subjective and can vary depending on individual preferences and experiences.