The samples, however, are usually provided free by the catering departments of a hotel or a caterer that might service a convention center, so I don't think that's what they're referring to here.

然而，这些样品通常由酒店的餐饮部门或可能为会议中心提供服务的餐饮服务商免费提供， 所以我认为他们在这里指的不是这个。