How much money should I take to Vegas?

I'm going to Vegas for my bday and 4th of July....I'll be staying for 7 days and 6 nights...I know I probably will need a lot of money...but what can I "get by on"...I gamble VERY LITTLE! Like literally 30 bucks (I don't really like throwing my money away), I drink a lot (I know drinks r free in the casino BUT if I;m not gambling too much I prob wont get too many freebies), and I would like to go clubbing...IDC about shopping...oh and I do want to go to at least 2 shows....so about how much do u think??? Thanks in advance for the tips! ;-)