So a group of us (7) are going to Vegas next week, and my girlfriend and her friend are bringing her younger sister for her 21st birthday. I'm over 30 now, and haven't been to a club in Vegas in years, and don't really have any desire to visit one any time soon. I'm looking for an easy to get into but fun place for them to celebrate her 21st birthday. I don't think they want an all out night club like Marquee or Tao, but somewhere where there's lots of binge drinking going on, lots of people hanging out having fun and possibly a place to dance. It should also be easy for a group of 3 guys and 4 girls to walk in and get plastered. Any recommendations?