It is all up to the people involved. I have seen 20 somethings party with people three times their age then others that would not party with anyone more then a week older.
I personally tend to like to party with people close to my age and I am hmmmm, older.
Laura tends to like to party with guys younger then she is but I have seen her party with guys older then I am. (Yes, there is some out there older that can get it up)
Since the avg. age in the Lifestyle is about 42 years old there is someone for everyone. Take your pick and enjoy it.