"... be thinking of B-3s and Leslie's going round"
This is a reference by keyboardist Lamm to some of his stage gear. Hammond B-3 electric organs were very common among rock bands in the early 1970s, and Leslie cabinets were a popular accessory for rotating multiple organ speakers on a vertical axis to produce a vibrato at varying speeds.
"... be thinking of B-3s and Leslie's going round"
This is a reference by keyboardist Lamm to some of his stage gear. Hammond B-3 electric organs were very common among rock bands in the early 1970s, and Leslie cabinets were a popular accessory for rotating multiple organ speakers on a vertical axis to produce a vibrato at varying speeds.