I like pubs where you can still buy a snack, such as an uncomplicated cheese or ham sandwich, for a reasonable price. These days most pubs seem to insist that such a sandwich is accompanied by chips and salad, and then charge you £8.95 for it!
Some of the more successful 'old school' pubs though seem to take a different approach, whereby they don't bother serving food at all (thus saving on the cost of an employing a chef) but permit customers to bring their own food in from nearby takeaway establishments instead, possibly even providing plates, cutlery and condiments for customer's use as well.
While I like to see a dartboard in a 'traditional' pub, they don't seem to draw in many customers these days (unless there's an active pub darts team). However bar billiards tables (which make a pleasant change from pool tables) seem to be very popular in some pubs. Packs of cards and crib boards are a 'must' in traditional pubs but chess sets also help to draw some customers in.
Whether it's 'traditional' or not though, I'd be unlikely to regularly use a pub which didn't offer free wifi. ('Traditional' doesn't have to mean 'old-fashioned'!)