The club membership charge is approximately Rs. 7,00,000/-, so that is pretty much the impact of opting-in or opting-out of the club membership of Ireo Skyon Clubhouse. While this doesn't quite translate literally when you look at individual transactions, considering the various other factors that effect the resale price in Ireo Skyon come into play.
Sometimes, if you are at the right place at the right time, there are changes that you get a deal which may be better inclusive of the club membership, while at other times, this could be the other way round.