I belong to the rec center at a local university and it's a great place to work out, especially during the week. Great equipment, fairly empty in the mornings, plus it has a NCAA competition-level pool that is hardly used on weekdays. It tends to be "my" group of fit retirees (many tri-athletes) and of course the students (who never get any older from year to year!).
The spinning class is OK, but what really has gotten to me lately is the music that the instructor plays. I like classical, jazz, blues, rock, and other genres, but head-banging rap music with unintelligible "lyrics" is just not my thing apparently. Next time I attend I think that earplugs might be in order...