A site is getting around 8,000 or 9,000 monthly visits (around 12,000 page views) according the the traffic stats program. Also, people are bookmarking it and the bounce rate seems pretty low. However, I think you need around 1000 to make at least 500 a month or more from Adsense. Is that correct?
if you mean 100 clicks to get $500... im not sure depends on how much there is paid per click.... why dont you try to sell affiliate products related to your niche?