Opening retreat?

[Punchinello]

"We just hit it off in a little guitar pull at the Leadership Music opening retreat."
What is an opening retreat and what does a guitar pull mean? Thank you very much!

 

[lauralie2]

Guitar pull means to play the guitar as in to pluck or pull the strings.

Opening retreat means the beginning, the first day of the retreat, as opposed to the end, the last day.

 

[Punchinello]

Thanks but what does retreat here refer to then?

 

[bhaisahab]

Thanks but what does retreat here refer to then?

More context might help.