Ben Flajnik & Courtney Robertson Sip Bloody Marys Poolside
05/15/2012 AT 05:55 AM EDT
With fiancée Courtney Robertson in tow, Flajnik was also joined by his mom Barbara and sister Julia at Joico's On the Go Beauty event on the rooftop of the Thompson hotel in Beverly Hills.
The reality duo stuck by each others' side the whole time on a folding chair in front of the hotel's pool.
"When asked if they wanted tea or an alcoholic beverage, Flajnik replied without hesitation, 'Alcohol, please,' " an onlooker tells PEOPLE. "The couple then sipped on Bloody Marys from the Voli vodka bar. They didn't show any over-the-top PDA, but they seemed at ease being with one another."