15% or 20% tip

A

So a few days ago, Jay-Z went out to a club for drinks with some friends. When the bill came, they tipped their waitress 15% which happened to be $11,000

Some people are saying he should have tipped 20%. Others are saying the waitress should be grateful for the $11k. What do you think? (The waitress isn't the one who tweeted btw)

Vote below to see results!