{blackbabes} Rihanna & Chris Brown Ignore Each Other at L.A. Club

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Well, that could have been awkward: Chris Brown and Rihanna were both partying at L.A. nightspot Greystone Manor Supperclub, but the exes stuck to separate sides of the venue, according to a clubgoer. Brown was there with rumored girlfriend Karrueche Tran and some pals. According to the clubgoer, the exes never interacted.

But that didn't stop Brown from dancing to Rihanna's music. A few nights earlier, the R&B singer was out at Tru Hollywood with his friends, and he was in a "great mood," a source, who spotted him dancing on a table to her hit "We Found Love," tells us.

Back at Greystone that night, the singers were in good company: Dr. Dre was there celebrating his birthday.