Do you think of dogs as unclean? Was I wrong for this?

Yes. They carry dangerous bacteria in their mouth that if get into a wound of an immunocompromised person, it could cause sepsis. That's why when you're bitten by a dog, you should take antibiotics.
Further, they sometimes roll in feces or corpses of other animals.
They run all around outside so unless you clean their paws when they enter the home, it's the same for me as walking around in your shoes. If it's just your garden, okay, but not public spaces where all the other dogs shit in the grass or people spit on the ground etc.

As for the cup, I guess I'd feel a bit squeamish about it too. It's better to throw it into trash.

Ah no, you should have left it on the ground for the server to eventually pick up and do exactly what you did with it.

Do I have to add that that's sarcasm?

You did the right thing. Everybody's a critic. Ignore her.

No, but I think of floors in public places as unclean. Still, when people drop anything off a table in one, they usually put it back on the table.

No, I don't think you did anything wrong.

You can usually tell with some certainty how people will interact with other people from the way they interact with animals. I have a gatekeeper lol

They can get dirty if you don’t bath them, especially if they get a lot of play time outside the house.

Not at all, I do it all the time with my dogs. Unless your friends are going to randomly start licking the table there is zero risk to them

Indoors? I can understand the cringe but at the same time they should be sanitizing the table between customers anyway.

Outdoors? I'm just glad when the birds don't crap on the table, lol.

Yes I do think that.. They are an animal after all, they have different habits and instincts. I mean, they clean their privates with their tongue after-all. Blech.

Side note: Although I am a big animal lover.

dogs cleaner most people,

I probably would have thrown it away.

Not unless they are the drooling type. I can't handle even looking at drool.

NOPE.....

But some folks are just germaphobes......

All animals are dirty in their own way

Imnot a big dog lover as it is.Is see them as walking filthbags.I see them licking their own balls,other dogs butts.Chewing used condoms,eating out of garbage bags.
Its why i stopped going in Starbucks because they allow fleabags in their cafes.

There are more germs in the woman’s mouth than the pups.

I would have put in trash but is coffee good for a dog?

They'd proably pass out if they saw how some dog owners and their puppers kiss.