Los Angeles' massive sprawl and dysfunctional public transportation make getting around rather frustrating, especially during weekends when service can be more erratic. The only rational way of getting around much of the city is to rent a car, in which case you’ll get a crash course in the complex freeway system and, if you're lucky, a taste of the notorious traffic jams. The underdeveloped rail system will only get you so far (although it does, fortunately, provide service to most of the main tourist areas). On the other hand Los Angeles' bus system is enormous and you should be able get wherever you need to by bus, provided you aren't terribly pressed for time.