Here are some things :
- notice her appearance, and how it changes the next time. You can go from respectful "nice haircut, it makes you like blabla" to weirdo "is this red skirt magic to make you such big breast ?" (if you're desperate for attention, be prepared to handle some reaction there

)
- the previous pushed to an extreme : notice that she exists "Are you new here ? "

You can play like "what the hell are you doing in MY restaurant" and ask questions about her, etc, and validating her.
- ask her for advice about the food, especially if you're with friends, etc. If you're late and just before leaving, you can invite her to join to thank her for the advice (or to make sure the food is fresh). You can play very picky and sure of yourself here "Oh no, mediteranean tuna is way less tasty than...blabla"
Don't take it too seriously
