Generally speaking, there are no full-time courses in universities for the aged. Whether to take full-time classes or not, the time of classes depends on the courses you apply for.
Take Shijiazhuang Muxiang University for the Aged as an example. At present, the courses offered by Muxiang University for the Aged are:
Dance category: folk dance, ballroom dance, ocean dance, classical dance, modern dance, shuffle dance, dance interest class.
Vocal music: chorus, national, pop and bel canto vocal classes.
Instrumental music: guzheng, erhu, cucurbit flute, saxophone, electronic organ, etc.
Calligraphy and painting: Chinese painting, calligraphy, photography, etc.
Opera: Beijing Opera, Bangzi, Henan Opera, Huangmei Opera Class, etc.
Fitness classes: modeling, yoga, recitation, Tai Chi, Baduanjin, Western medicine health classes, etc.
Electronic communication and smart phone applications: daily mobile phone use and smart phone applications (graphics processing, chat software, wealth making software, shopping software), digital photography, etc.
You can refer to the above courses.