I am trying to determine which towncar service to use. I was looking at the Happy Limo website and saw under the FAQ that a gratuity of $20 (roundtrip) is automatically added to the bill. Is this a standard practice for all the towncar services? I had planned to tip this much anyway but I'm not crazy about places that automatically determine the amount of tip that you have to pay...seems more like a fee that way instead of a tip for good service. Any info would be appreciated. Thanks!