how do you contact celebrities managers to inquire about shooting concerts at venues they book?

You will want to contact the publicist of the artist. Once you know which concert that you want to shoot at, you will want to email the artist publicist with the following information in order to get a press pass for the concert:

1. Name of Publication You Are Shooting For
-if the publication isn't well known then you will want to include audience and demographic info
2. Which Client and Event You Are Wanting to Shoot At
3. Other Events You Have Shot At
4. Link Where They Can Find Your Previous Work
5. When and Where The Material Would Be Published