You should look at what you have available to spend and set your budget accordingly. I haven't noticed major price inflation over the last couple of years, but my budget has grown each year because I make more money now. In other words, tailor your trip to your own budget!
On this past trip, I had a budget of $300/day for 2 people. That's the daily
average... keep in mind that there are days when you might not go out to the big clubs. We would spend more on club days and less on nights off (and I got lucky because the missus bailed out on three club nights so I saved $$

).
Here's an example of a decent budget for 2, loosely based on what we spent:
50 euros - random stuff
70 euros - dinner
60 euros - club tix
30 euros - pre-club drinks
40 euros - in-club drinks (not including the free one w/ ticket)
total: 250 eur, or just less than $300.
Keep in mind that that's for 2, so you could do this for $150. Now, if you want to spend only $100, cut back on something. Eat cheaper - there's plent of decent restaurants where you could eat for less than 20 eur, or fast food places for even less. Get drinks from the store and have your own pre-party sessions. Take some nights off and spend less on those days and more on clubbing nights.