A DJ or a deejay is the short form for a disc jockey. A disc jockey is the person who plays music for the people and selects and plays according to the audience taste. There are various types of DJ's such as a Radio DJ, Club-DJ, Mobile DJ's etc. A radio disc jockey plays music on radio stations. A club DJ is a deejay who plays music at clubs, bars, discotheques, at parties etc. A mobile disc jockey travels and plays music for audiences.
A Club disc-jockey usually uses the following equipment:
Music
Sound Mixer
Multiple Sequencer
Headphones
Microphone
There are other equipments that augment a DJ's work such as the DJ mixer, disc-jockey digital controller etc, but the above mentioned are the most basic requirements for a disc-jockey.
If you are looking to get a DJ gig then choose a mid level club as large night clubs do not offer jobs that easily, though they are high paying ones. Large clubs not just offer more money but also a huge audience. To get a club DJs job you need to find out the clubs and their sizes in the area of your choice. You would need to go to each one and meet the concerned person at the clubs and find out if they need a disc jockey. Even if there is a current D-J you can offer your mix CD and provide contact details. You never know when they might need another club disc- jockey.
Keep visiting the clubs every few weeks and let them know that you are there and in due course you will get a Club DJ gig.