Prague is a city of culture and even during the winter months, especially in January, you can get rid of the winter blues by dressing up and enjoying yourself at a concert, opera performance or ballet. There are many theaters and concert halls in Prague but here are the websites of some of the larger venues:
Hybernia Theater – www.hybernia.eu/
National Theater – https://www.narodni-divadlo.cz/en
O2 Arena – https://www.o2arena.cz/en/
Municipal House – www.obecnidum.cz/en/
Forum Karlin – https://www.forumkarlin.cz/index/en
Vinohrady Theater – https://www.divadlonavinohradech.com/