Tables,
Sure, tables get a wipe-down between customers, but have you ever seen the ratty old rag that they usually use? All is basically does is spread the gunk around. If any of your food touches the table, consider it a goner.
Rims of glasses,
If you ever see a server hand you a drink with their fingers on the rim of the glass, request a new drink. As a rule of thumb, always drink from a straw at a restaurant.
Salad bar tongs,
These are rarely replaced during service, and are handled by everyone else who approaches the salad bar. They’re basically as dirty as the toilet flush handle.
Salt & pepper shakers, ketchup bottles,
The items that remain on the tables throughout all of service can get quite a germy buildup over the course of the day. Ever notice that they’re sometimes sticky? Yeah, you don’t want to be touching these very much.
Menu,
Some icky news: menus are rarely if ever given a thorough cleaning, especially if they’re paper. Recently, Good Morning America sent a team to swab items on the tables of 12 restaurants, and they discovered that menus carried the most germs, averaging 185,000 bacteria.
Ice,
An investigation into fast food restaurants in the U.S. found that 70 percent of the ice in the ice machine contained more bacteria than the water in the toilet.
Lemon wedges,
The lemons that garnish your Diet Coke and limes that get muddled into your mojito most likely weren’t washed first, and they’ve been sitting all day (or sometimes longer) in the open tray on the bar before the bartender touches them with his bare hands. If you squeeze the lemon into your soda, don’t toss it into your drink afterwards.
Just to name a few, doorknobs, toilets, bathroom floors, etc.
Bone appetite.
source: The Daily Meal