Although I may have exaggerated a little calling it "fierce", I'm not pulling your leg - Jolly Roger is a pirate boat with a pirate crew and is generally seen sailing young land lubbers out into Table Bay for adventurous birthday parties or similarly celebratory occasions. The little trip costs anywhere between R50 and R200 per person, depending on the time of day, the package that you purchase, and the size of your shoe. (Hint: People wearing kids shoes pay a whole lot less than those wearing adult-size shoes.)
Between the plundering of defenseless ships in Table Bay you'll find the murderously cruel crew with the moored Jolly Roger at the V&A Waterfront's quay 5 - close to Sevruga and just outside of the V&A Shopping mall. Visit this pirate map to find the gap where the Jolly Roger should be moored. (I guess it was out plundering when the satellite made it's turn over the Waterfront!)