First time to see DCC in Colombia. I went to restaurant in Medellin in the Laureles neighborhood. The name of the place is Ay Caramba, but the receipt shows Bodegon Picante. There are a few foreigners in this area, and it's in the one of the main dining areas of this neighborhood. So I'm sure other foreigners have hit this.
I used my CSP and the waiter brought one of the portable machines. He was confused at first because it was showing the conversion rates, and then a choice in the bottom: COP or USD. I told him to pick COP, but he was hesitant at first. He thinks because I'm a foreigner and that my card is a foreign card, that he should pick USD. I had to tell him twice to pick COP. I do speak conversational level Spanish, so that helped.
I think the processor is CrediBanco since that's what showing in my receipt.