[quote name='Mottlefeeder' timestamp='1468003467' post='3088043'] 
Lots of interesting comments, and just a little bit of negativity towards guitarists. 
 
Just to recap, a guitarist turns up at an open mic night with the words and chords he/she needs, and an indication of where the capo goes to get the song in the right vocal range. A bass player introduces himself and asks if he can join in. There is no way that the guitarist's notes for his/her benefit are wrong just because they do not help the bass player. 
 
[/quote] 
 
Absolutely this. 
 
Bass players can be a right pain in the arse at acoustic singer/songwriter type open mic nights where more often than not the material being performed was never meant to have bass on it in the first place.