All the time. We have a season subscription to the Oregon Symphony, the Portland Opera, and the Oregon Rep Singers. We have a Rep Singers concert to go to this afternoon. My favorite classical station (which I linked to on my profile actually!) streams on the web at
allclassical.org.
Some of my favorite composers are Edward Elgar, Vaughan Williams, Franz Schubert, Arvo Pärt, and Antonín Dvorák.
I listen to a ton of other music as well, like folk, folk rock, classic rock, alternative, industrial, goth, and punk.
I'm lightly involved in the young fans of classical music "club" in Portland. We're not that unusual! And hearing all the great young classical composers out there, I don't think it's necessarily on its way out... it's just changing, like it has for centuries ("classical" can either be a really specific term referring to music in a certain style from 1750 to 1820, or it can be broad and mean everything directly developing from [very broad concept] secular and liturgical music from the 16th century on -- in which case it is still very alive and well today).