Come and try playing Diving Chess at this year’s Mind Sports Olympiad–its just chess in a pool but instead of chess clocks, you can think for as long as you hold your breath:
Alternatively, for those who want more traditional chess, there’s also blitz, rapid, exchange and the British Championship for Chess 960 (aka Fischer Random).
Chess 960 is just like regular chess with the exception that the pieces are randomized behind the pawns on the home ranks. Note that bishops must still be on opposite colors and each player still has the right to castle on both sides.