OAKLAND, Calif. — It is basketball by invitation only, and if you are lucky enough to receive one, you get to watch Stephen Curry and Klay Thompson hoist 3-pointers or gawk as Kevin Durant extends his impossibly long frame and soars to the basket. You also get to take in the rest of the Golden State Warriors, the most dazzling team in the N.B.A.
You get to do all this by watching the Warriors practice — yes, practice.
Not content merely to cheer at blowout wins, a growing number of celebrities, boldface names and “friends of the family,” as the Warriors describe them, have sought entree in recent seasons to one of the more exclusive venues in sports: the team’s practice site.