So we are not strictly a blues band, but we do play a lot of blues tunes. Drummer, Singer, Keyboard and Bass (me). Our style is old school R&B, Motown, Soul with some blues standards and a few other blues songs we like... Our guitarist is in his late 20's, the rest are a little older. He's great, able to play lead parts and play competent solos; Nothing revolutionary but certainly not a blues master. Except... He can't count or play in 12/8 time. The songs we try to do in 12/8 time he gets flustered and usually stops playing after several bars. He just... loses his place and can't find his internal rhythm. The drummer and I have played several choruses while he listens, when he starts to feel it, starts playing and then just loses his place again. I have literally tapped my foot on his while we play to get him to feel the beat and the subdivisions, same thing. We've made him a playlist of mid/slow tempo 12/8 blues to listen to and learn, he can learn the riffs but once he has to do something on his own he just gets flustered, loses it and either stops playing and can't find a place to get back in or tries to play 4/4. Anyone encountered anything like this before? 12/8 isn't that weird of a time... I've asked the singer if it's the rhythm section, she says definitely not, we've had a few guest/fill in players and they can do it without an issue so it leads me to think he just has this odd inability to feel a tune in 8 !