She's hooked up with jocks before, but the new rumors about Khloe Kardashian dating NBA star Robin Lopez seems like BS ... so says Kim's BFF Jonathan Cheban. Cheban -- who's super tight with all of the Kardashian sisters -- was leaving Craig's in West Hollywood last night when we asked about…

Portland Trail Blazers star Robin Lopez didn't sulk after losing to the Rockets last night -- he spent his Wednesday teaching kids about the importance of reading ... and TMZ Sports has the pics. The 7-footer rolled over to Chief Joseph/Ockley Green School in Portland and talked to kids from…