Yes, it may seem completely bizarre but there is an opportunity to go see some theatre in absolute darkness in Buenos Aires but trust me, it's really fun. It's probably one of the most unique experiences I've had in the city and would really recommend it.
The creative energy in this city is endless and this place is just one example. Most of the performances are in Spanish but with the lights out it's a good opportunity to focus in on your listening skills instead of being distracted by all that's around you. If you're looking to do something a bit different then go for it.
Cheaper (or even some free) tickets can be purchased at the venue on a Sunday
Mon-Tu: 17:00-23:00
Th: 17:00-00:00
Sa: 15:00-01:00
Su: 15:00-22:00
Fr: 18:00-00:00