I suppose the two issues with this idea are a 1)a bit too long and hilly 2)If people can only really get to the top of ally pally for 7ish/later then there isn't an advantage over traditional train routes in terms of it finishing earlier / more Pizza time.
Another Idea I had is to ride this https://www.strava.com/activities/724785112 which is pretty TNRC worthy and then go for food after.
I suppose the two issues with this idea are a 1)a bit too long and hilly 2)If people can only really get to the top of ally pally for 7ish/later then there isn't an advantage over traditional train routes in terms of it finishing earlier / more Pizza time.