Yo!
Great idea and as Arran said beats standing around kicking tyres all day!
Although, don't underestimate how knackering the karting will be let alone bowling the next day! I know I wasn't the only one suffering for days after carpet-tec!!
In fact, come Sat night we'll all be having an early... well I know I will...
Maybe bowling Thursday and karting Friday???
Just my 2p
Cheers