I'll kick this off since I'm sure there's a lot more things to get added, but I know a guy who hired a bunch of fresh students to work his bar, only to find that many of them didn't actually know pub etiquette, having not actually been inside one as they were all closed for 2 years (in some places).

This thread is to teach some pub etiquette that you used to just absorb by going!

Queuing is different in pubs. You do not form a long line, you use the whole with of the bar, but know your rough position in the queue. The bar staff will generally serve you in the right order, and may ask "who was next?" if they lose track or step in to help a busy bar.

You will queue wide, then deep, but always let someone who's been served out.

Beer is either a pint or half pint. It's perfectly acceptable to just have a "swift half".

You can carry more than 2 pint glasses at a time. You can carry crisps or nuts in your teeth. It's polite to drop your empties back at the bar if you're passing.

It's ok to tip bar staff, rounding up the change or a pound or so. Beware "one for yourself" used to mean "have half a cooking lager on me" but isn't so widely understood these days, so you might get a "oh great, I'll have a pint of premium lager thanks" which is clearly taking the piss. Tipping is about goodwill and camaraderie, but if you do it regularly enough, and the bar staff come to recognise you, it won't hurt how quickly you're served when it's busy and you reach the front.

Use cash if you can. Cash is fast, and cash can be used for tipping without management topslicing the money.

If your order is regularly identical, and you are friendly, you'll get to a point where the staff will know what you're after and might serve you with a nod.

Some pubs have pub dogs. They live on love and crisps.

If a pub has a flat roof, you're playing on hard mode, keep to friendly beginners pubs to begin with until you are truly at home.

If you pop out to smoke, either take your pint, or leave a mate in charge of the table. An empty table is forfeited even if the glasses are full.

If there are enough tables to go around, it's a shit pub/night.

Pub furniture is heavy. If a table wobbles, fold a beer mat and use it under the leg :)

Pub loos are never pretty. Poo before you go. Seriously.

Over to the community for more pubs starter tips ...