Well Not sure if Prabu is riding this saturday & I too have to reach home early, I'm game for a ride but can't spare much time.
I have a few options which I plan to do..Click on the links to see the route on the previous rides.
1) Aarey - Very Small ride but it'll be hill repeats that is climb Newzealand Aarey Guest house 3-4times & push off.
Route - http://connect.garmin.com/activity/18271460
2) Bandra & Back - not very long but a 50km fast ride on the Highway.
Route - http://connect.garmin.com/activity/12593312
3) Thane - 60kms with a decent pace.
Route - http://connect.garmin.com/activity/11282020
4) Uttan - 40km this is a mixed bag ride with the Fast Highway section, very slow & sweet small road & Green section & a very small killer climb section & then again a very nice tarmac for another fast section & to end the ride a Ferry to Gorai :P
Route - http://connect.garmin.com/activity/16058560
Anyone who would like to join me (& Prabu if he is riding) are welcome. Do post in your preference if you are joining in, We start our ride from near our Home (Charkop-Kandivili), & a common spot for meeting can be the Higway - Oberio Mall for (1,2) & Tata Steel (for 3,4).