Hello Roooob....
Now if I really wanted to entince you into gliding I would describe myself as 19 years old, red haired, already at University, already a solo pilot at Shenington gliding club....but that's not me, I'm just an old fart.....however I'm sure she would be pleased to introduce you to the gliding scene at our club. Or you might be happier to mix with the Oxford uni kids at Bicester (otherwise known as Windrushers).
I would expect Cambridge to send a few youngsters down to Gransden Lodge...that's the Cambridge club.
Gliding is for all sorts, there is a social side, but did you actually want to learn to fly or just socialise? If flying is your dream, it makes a lot of sense to (1) start young and (2) start with gliding. At our club a junior member (under 25 years of age, that is) pays a yearly subscription of £35, and £8 per winch launch. By the time you achieve solo, and learn to use thermals to go cross country, like the young lady forementioned, you would be well on your way....good luck!