No, and I believe you're just attempting to cause a mischief or disturbance. Those locations are for paying customers and some (cruise company) chosen others to eat, mingle and be seen by/with passengers as part of the experience.
Shipboard life (not just cruising) is not some type of egalitarian, communal living experience. Discipline, privacy, communications, and a host of other considerations to keep things running smoothly and accomplish business objectives have always been part of the environment.