Okay I went to the website and it didn't clear things up at all.
They do imply the charge is for the food only. I can't remember if I tipped or not.
But the Specialty food and service was excellent on the Infinity. Much better then the dining room. I highly recommend it.
From the website.
How much do the specialty restaurants cost?
Subject: Specialty Dining
The Murano, RMS Olympic, SS United States, SS Normandie and Ocean Liners restaurants have a cover charge of $30 USD per person which includes a complete four-course meal. Beverage and Wine are offered at current menu prices. There is an option of ordering a six-course Menu Exceptionnel which includes wine with each course for an additional charge.
Tuscan Grille has a cover charge of $25 USD per person which includes a complete four-course meal including Appetizer, Soup or Salad, Entrée and Dessert. Beverages and wine are offered at current menu prices.
Silk Harvest has a cover charge of $20 USD per person, which includes the full menu including starters, entrees and desserts. Beverages and wine are offered at current menu prices.
Bistro on Five has a cover charge of $5 USD per person Beverages and wine are offered at current menu prices.