Originally Posted by
caleo
Bottom line is that it depends on the city and the size of the hotel. If you're going somewhere like the mgm grand in Las Vegas, they'll probably never know. If you're going to a 30-room hotel in Dublin, they probably will.
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This is excellent advice. It really depends on the size of the hotel, how inconspicuous your group can be entering/exiting the room, and how much noise you make.
Also keep in mind that in many smaller hotels (and even some large chain hotels outside of the US), rooms can be extremely small. A single room literally may not have enough room for 7-9 people to sleep on the floor.