Vision's genre will vary from weekend to weekend so check ahead to see what interests you, oh there is plenty of eye candy too ^ . A plus is that Vision is on Dearborn, north of Ontario, so it's within walking distance from the major hotels. It really doesn't get hopping until midnight to 1am, and they are open until 4am or 5am on Saturday night. Cover is $10 to $20.
http://www.aceplaces.com/vision/index.html
Crobar is another excellent choice.