The limousine’s reputation as a luxury car would, expectedly, make it the vehicle of choice for other more serious occasions, such as corporate travel. In this case, the rules change: it is no longer about you having the best time of your life in the limousine; this time, it all depends on the vehicle’s purpose, and what your role is in relation to that purpose.
If the limousine was rented for you, either as a reward or as an offering for a bit of fun, you are expected to enjoy your ride, but retain proper professional behavior. The vehicle’s many features will give you the opportunity to either relax or do work, all without the hassles of interruption and stress. As the ride is still of a professional nature, drinking might best be avoided, as it might be deemed as drinking on the job otherwise.
There might also be times when the limousine’s purpose is to show a number of clients a good time around the city, and your role is to take care of those clients. In situations like this, the rules are loosened, and a more casual, friendly behavior is most appropriate. As the experience depends on the clients’ desires, it will mostly be all about giving them a good time, to be enjoyed between professionals who want to break away from the stress of work. You, therefore, are expected to have a good time with them, but of course, within reason.
These different situations are what call of a number of different kinds of behavior expected of a limousine passenger. Although these are not exactly clear-cut, and many other occasions call for a limousine rental, perhaps the one most important thing to remember is that, just like with any other occasion, behavior is dependent upon the other people involved, the nature of the circumstance, and the specific kind of behavior expected of you, personally.