Yes Yes YES to the use of their name. Take 2 min to ask them a question about themselves. Try to sound like you have noticed them and let them know that they are people to.
Apologize for special orders. Something like “I am so sorry but I really cant have any Avocado on my COB salad. I can’t even scrape if off.” You might even make fun of it ... “You see, I have this allergy and I would REALLY rather not have the ambulance take me to the ER right now”
Best tip of the whole article and follow-up - if you are using a discount coupon, be sure you tip on the full amount of the food/bev bill. I have watched a lot of people bring a BOGOF coupon into a restaurant. They are so pleased at the low cost of the meal. They never think to tip the waiter for serving TWO meals!
Then don't order the freaking Cobb Salad. You know it has avocado. Get something else.
Rubbish!!! I do not care what the name of the person serving me, nor do I appreciate them trying to intrude into a private setting. I am in the restaurant to enjoy time with my party, not with some total stranger.
I expect them to act like professionals and do a prompt, efficient job and respect our privacy. For that I am happy to treat them with respect and tip an appropriate amount.