Well, you can't go once you turn 27, right? So just stall them until then and that will be the end of it. Or you could take the more direct approach and just tell them to go fuck themselves, but I assume that since you haven't done that already, you aren't considering that option.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell