Old is all in your head; be as young as you want.
These kinds of questions come up from time to time, and they are pretty much the only ones I make comments back about. So, by searching my name here, you'll run in to lots of discussions over the last 8 years about older rollers and their issues.
Generally, as long as you give a good 6 week to 3 month break between doing it, you can continue indefinitely having great experiences without having a loss of its effectiveness. So, let your brain rest and recuperate after you have a night of it.
I agree with the other posters on this question that it can be a great way for a couple to deepen their committed relationship. One-on-one parties with your significant other can be landmark moments in both sensual connecting with one another and in communicating deep feelings. A safe place removed from interruptions and dangers is a must; we like darkness, party lights, good music... in short, basically the things you would enjoy at a party with others who are partying on it.
I also think that a person can remain open to sharing the experience with more close people than just your significant other. A nice party for us is with about 6 or 7 other couples, plus assorted single people. Our ground rules are unbending: nobody attends who isn't doing it. This policy has kept some couples from having the experience (i.e., where only one of the two is into exploring the stuff), but we all would rather not be around people who would be judging people by their behavior when they are high. As you know, it is not unknown that a person on it will do something that straights would regard as weird.
It isn't only young people who can be very opened up by the stuff, so the poster who contrasted getting cozy with "hot" girls as being something only for young people, something he has now left behind for intimate parties with his wife, he may be missing something. People in secure relationships can come to be relaxed about seeing their partner being happy, even if she/he is hugging and dancing (etc.) with others. After 20, 30, or in my case 40+ years with a partner (we're in our 60s), most of the issues of jealousy and possessiveness can be transcended. In our use of it, I get really excited even by the lead up days before a party where other open-minded, non-possessive couples we know and like are going to be partying with us. A house party doesn't have to erupt into some full on orgy to still put a lot more of a sparkle into your year. In this light, New Years Eve will be as enjoyable for us 60 somethings as it can be for 20 somethings, or 30 somethings, or... And yes, sometimes even old fogeys get a thrill from sharing some sensual moments with people other than their partners. (Hot tubs are especially fun!).
So, to review: have the right place; have the right people; don't be judging yourself; and letting go with close friends, or just with your partner can be a peak experience that makes life sparkle long after the rest of the world would stop labeling you a "raver," or "hot." Fun is what it is about, no matter what age you are.
