Rihanna & Chris Brown Party At SL Without Karrueche + Diddy 'Whisks' Cassie Off Her Feet

A week ago, Rihanna shot dirty looks at Chris Brown's girlfriend Karrueche all night while the threesome partied at Greystone Manor (click Pink for more). 

Breezy & RiRi were spotted at Manhattan hot spot SL over the weekend, and Karrueche was NOT present...

The former lovers tried to keep their 'distance' from each other, but were caught gazing at each other -- Breezy even sent over bottles of expensive Ace of Spades Champagne to RiRi's table...

Rihanna and Brown partied with their respective entourages — and exchanged many glances but few words — at the Meatpacking club until yesterday’s early hours.

A spy said, “After Chris made his way into SL with a group of friends, Rihanna pulled up with her own group of friends. The infamous exes sat far enough from each other to not be able to talk, but close enough to keep an eye on one another. Chris sent Rihanna two bottles of Ace of Spades Champagne. DJ Sinatra had both Rihanna and Chris dancing at their tables.

Also spotted on LOVERS LANE, was Diddy & Cassie showing Twitter love AGAIN (click Pink for more)...

Diddy shared a picture of the 'unofficial couple' during there romantic time in Cannes -- with Cassie touching her nether regions + Diddy lookin' like a proud pimp boyfriend

Diddy writes, "in case you forgot...here's a lil reminder:) YOUR F-CKING SPECTACULAR"

Cassie responded with love hearts ❤❤❤ ...