I'd always wanted to go to one and finally got the chance to at the Isle of Wight Festival this weekend, Butlins (random) had a tent set up with one in and omg it was even better than I imagined

the three nights I spent in there were genuinely the highlights of mine and many others weekends...so ****ing good singing along to classics like Mr Brightside, Wonderwall, Show Me Love, Three Little Birds, New York New York spread out amongst a load of house tunes
Being able to choose what to listen to as well

and hearing everyone sing when you take your headphones off <3
If you get a chance to go to one make sure you do, I miss it so much </3