Imagine a situation, in which three former schoolmates are getting together in a restaurant. They sit down at the table and one of them is saying, "So then, let's have a drink - just to mark our meeting tonight." Would this phrase sound strange in this kind of informal situation?
Does the word meeting sound too official here? Would the word "reunion" sound better? Or, perhaps, a completely another word?
And what about the verb "to mark"? Would "to celebrate" be a better choice?
So, in short, what's the common an informal way in English to describe an act of drinking that is done to "honor" a meeting?