Do you mean to Whitby, or the cafe itself Intruder? The cafe is actually at the railway station, and shares parking space with a car park - the bikes just park along the front of the cafe, and in any random space the cars can't fit into.
On a good day, there may be around 60-70 bikes there.
Must say though, it's worth it for the cake
alone - they're HUGE
, so you can easily share them.
As for Whitby, it's just a lovely old fishing town - plenty fish n chips 'n stuff, good to walk round, whatever!