I give the R Lounge five stars.  To cut the long story short, this place is the best after party venue in all Palo Alto. Opened in 2010 by Caesar de la Paz III and then inherited by Ramon, this place has unquestionably become the to-go lounge after you're kicked out of Rudy's or The Patio at 1:30am.  Every Friday and Saturday  night, creatures and cocktails come together at the R lounge and new adventures unfold. When ligths go off at the R Lounge, the night goes crazy and you will not want to leave until sunrise. Highly recommended.
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