Google employees held a protest in San Francisco days before the company ended its long-held TGIF meetings, according to an internal memo obtained by CNBC. Some 20 people organized at Google's office in downtown San Francisco to protest the company placing Rebecca Rivers and Laurence Berland on sudden and indefinite administrative leave the prior week, the memo states. Authors of the memo, which was circulated internally at Google on Monday, claimed the actions were an act of retaliation against the workers.