Tea break? I like tea as much as the next person (if not more so as Dronfielder's can testify!) but I have recently been finding that I prefer an hour and half or hour and three-quarters rehearsal without a break than a 2 hour one with a break. It always annoys me that tea/fag breaks always take longer than the conductor asks for (this is not just in Brass bands), 5 minutes becomes at least 10, 10 minutes becomes 20. Also I find that that it is easier to keep concentrating without an interruption in the middle of rehearsal.