Yeah I hate when they include service charge in the bill too but I wouldn't cut off my own pee pee, I'd simply refuse to pay it and if I was provided with good service then I'd leave a tip (not the tip of my member though...)
Hahahahaha! He had a sense of irony didn't he! Zizzi is French slang for "penis" (kinda childish slang, like we might say "willy" in English). Most members of zizzi's staff know this, I think it must be some kind of in-joke.