Depends on the event, but usually $25-35 for men and $20-25 for women. I'm talking about the night club, not the pool parties that'll start when it's warm enough. A top show, like when I saw Zedd there for New Year's was $100-150. (I'm also assuming you just mean cheapest entry and not a reserved booth with table service, which starts close to a thousand and tops out over $10,000)
It depends on what is going on at the club. Could be as low as 30 and as high as 100. Also depends on if you want bottle service.
Thanks! Your answer is awaiting moderation.