This website contains age-restricted materials including nudity and explicit depictions of sexual activity.
By entering, you affirm that you are at least 18 years of age or the age of majority in the jurisdiction you are accessing the website from and you consent to viewing sexually explicit content.
That just fucks over the waitstaff without harming the business at all.
Best option is to walk out as soon as you see notice of a service fee. It should be printed on the menu or a sign posted on entry.