Hipsters know what's 'hip', 'trendy', 'radical' (they'd avoid that word). How they do this depends on your level of skepticism towards the hipster. They are either attuned to the cosmic waves of human awareness, surfers of the collective consciousness, simultaneously drawn to the same games at the same time, or they read the same websites.
Over the past decade, as technology has improved, developments such as Bluetooth and Wi-Fi have enabled mobile gamers to achieve the Holy Grail: Multi-player gaming. For mobile phone users, an Infrared, Bluetooth, GPRS, 3G, Wi-Fi, AI, MMS, or Wireless LAN connection meant being able to play anything from Tetris to F1 together.