There is no way to answer this. As a bartender your main source of income comes from your tips. The bar your at, how busy they are, what time and day your working, your city or area, and how well you sell yourself and work the customers all make a difference in how much you will make. Ive bartended at some places and made no more than $300 a week and ive worked some nights at places and made over $2000 a week. It all depends on your customer base and where you work.
Your personality makes alllll the difference. If you're fun and energetic and know how to talk to people, you can earn lots of money. If you're a drip and just ask what they want, make it and serve it, then you probably won't make a whole lot. Being a bartender is 20% making drinks and 80% people interaction. Good luck!
I think they earn 5-8$ an hour plus tips.