I’ve already mentioned decorative tiling on pubs as a feature which helps to improve their appearance and draw people in. This is hardly the only strategy for enhancing the general attractiveness of the property; perhaps the simplest and most effective is the use of flowers and foliage. This can range from a few well-placed and colourful hanging baskets or flower trays above the doorway, to being so bedecked by ivy that the building underneath is barely visible. Hello, welcome back, it’s been a few months as usual!
There’s no real link between the amount and quality of foliage on display and the quality of the pub underneath (or its beer), but it at least betokens a certain regard for appearance that sets apart the publicans who really care about their premises. You may not be able to ascertain whether a good pint of ale will be available, but you can at least be sure that somebody cares about the pub experience enough to make it worth your while going in; there are worse methods by which to make a judgement about any particular pub.