Here's a breakdown:
* Quedamos: This is the first-person plural form of the verb "quedarse" (to stay, to agree), meaning "we stayed" or "we agreed."
* En: This means "in" or "at" and connects "quedamos" to "salir."
* Salir: This means "to go out" and refers to the planned social activity.
Let me know if you'd like more examples of how to use "quedamos en salir" in a sentence!