1) I went to the show (I never go to the show...(movies)) - or - We/I attended anything "serious" - or - often, starting the sentence with what we were doing there... "I was eating popcorn at the game yesterday".... however, I, personally, would never start with an a-matter-of-fact statement like "I went to the pub last night. Within minutes of my arrival... more like "I was hanging out at the pub when out of nowhere this...

2) To someone I don't know, I won't say anything and let them explain themselves...

To someone I know, however...

-Glad you could join me/us...
-Where the f*** have you been?
-Run out of gas?
-You're late, as*****!