Los Angeles is a hot spot during the offseason for NBA players as it's easy to find pickup games. This is true for the Oklahoma City Thunder as many of the players are in town and have been working out together. From Anthony Slater of The Oklahoman:

"On Monday morning, Kevin Durant and Russell Westbrook went through a workout together on UCLA's campus -- under the watchful eye of Billy Donovan -- navigating through some individual shooting and skill drills. By Tuesday morning, in that same gym near Beverly Hills, the two superstars were joined by a load of teammates and support staff. Among those confirmed in attendance: Durant, Westbrook, Donovan, Serge Ibaka, Nick Collison, Steven Adams, Anthony Morrow, Dion Waiters, Kyle Singler, D.J. Augustin, rookie Cameron Payne, assistant coach Monty Williams and Blue coach Royal Ivey. ... The workout was not mandatory. It can't be, per the NBA's offseason rules. But Durant spends a portion of his summer in Los Angeles and is there for business this week. Russell Westbrook is from the area and went to UCLA."