There are plenty of people who use the bars, you can just see by looking around in the arena people drinking from the cups, the peak time bar queues (and the cup monkey towers!)
Pretty sure it’s a socio economic thing, once you’re 24-25 and on a decent wage, there’s no chance you’re walking back to white, missing 2 hours+ of music to save £20
Then of course you have the day trippers too…
THE single best thing about Reeading though is that the bars are never overly busy, bar a couple of peak times a day, you never wait more than a minute or 2 to be served and even at peak, it’s 5-10 max, unlike other venues where it can take 30–40 mins (at which point I would be back to the tent!)