1. Screaming babies or ill-behaved children running around, or spitting or drooling food in the case of toddlers. This is especially annoying when you go to a high-priced restaurant for a special occasion (like Valentine's Day) and some well-off but still reproductive age parents think it's just fine to have brought along their young offspring, of whom I am sure they are very proud and from whom they are obviously inseparable. I expect this at McDonalds or Denny's, but not at higher-priced places.

2. Dirty bathrooms, or bathrooms missing locks on the doors, missing soap, missing paper towels or other towels.

3. Seeing some of the disgusting things the low-level kitchen staff in the back are doing when they think you are not looking (like dropping food on the floor, picking it up, and putting it back on the plates)

4. Tables so close together in an expensive restaurant you get to listen to incredibly boring "and then he said" , "and then she said" type stories about trivial things discussed by the apparently overindulged socialites sitting next to you.

5. Lights down so low you can't easily read the menu

6. Waiting 45 minutes or more for your table even though you had a reservation (especially when there's no room at the bar)

7. The din of too-loud restaurants (especially popular in San Francisco) where you need to yell at your dining mate to hear anything