I don't think so, at least not in the US. In the US, to successfully pursue a libel/slander case (which BTW is a tort, not a crime), the burden of proof is on the plaintiff who's suing for damages. It's up to him to prove the statement was both false, and that the person making the statement knew it was false. That's pretty hard to do.
"The coffee was served cold": how do prove this is false? At best, you can get a bunch of other customers who were there at the same time and have them testify that their coffee was hot. How does a restaurant get a bunch of customers to come to court to testify on its behalf? Good luck with that. You, the owner, can testify against that, but that doesn't prove anything, because of course you're going to deny that it was cold, so it's just he-said-she-said.
This is why libel/slander cases don't happen much in the US. It's just too hard to prove the person was lying. And if you do, how much is it going to cost you? In the US, you can look at Google Maps reviews or Yelp reviews or whatever and see tons of negative reviews for restaurants. It's extremely common; you won't find many restaurants that don't have some negative reviews, especially since people tend to do reviews more when they're pissed than when they're satisfied. Restaurants(and other businesses) sometimes fight back by posting bogus reviews, or trying to encourage customers to write positive reviews. Anyone who frequents reviews sites knows that a single bad review is just par for the course, as there's always someone who's disgruntled no matter what, and restaurants aren't perfect and have off nights or bad servers sometimes, so you just have to weigh the good with the bad (and also try to spot if they're stuffing the reviews; that's a very bad sign).
For your bar patron/bouncer example, I don't see how that's relevant. You're talking about physical assault there, which is a crime and has zero to do with libel or slander. Those cases usually wind up being about who can get witnesses to testify who started the fight and who was defending himself, and usually it's pretty messy as it's hard even for eyewitnesses to figure out who was in the wrong. Libel/slander isn't about who started what, it's about proving that a statement is a deliberate lie, and that's very hard to do.