Weeeeell, weeell, well. Now this is a very complex topic, full of different aspects, perspectives and attitudes towards the situation.
First of all, one must understand what such a club is like. Basically, any guest arriving, enters an illusion created solemly for the sole purpose of providing the proper setting for a dream holiday full of fun and carelessness. Guests can do anything from sailing and windsurfing, over group fitness sessions, to wellness treatments and massages, pool and sea swimming, water ski and wake boarding, evening shows and musicals, and of course diving. Well possible, I've forgotten tons of other attractions. In the end it melts down to a place that you do not have to leave for any reason, because everything you could possibly ask for is provided on the spot. In short, the perfect place to spend your family holidays and all among your dearest friends, the always happy hotel staff.
Of course there exists another perspective of this dream, the one of the staff members. Here, the dream changes into a nightmare for some and the fulfillment of a life for others. All depending on attitude, humor and intellectual capability of the person in question. In any case, fatigue is an omnipresent symptom.