My sessions are basically 1 per day, lasting anywhere from 3 to 6 hours. I've had 3 or 4 losing days in the last 20. One of those was the worst single-session loss I've ever had though. It was just a few days after I had moved up to NL 100, and it's documented in brief in the Bad Beats forum... I ended up losing 6 buy-ins that day. I'm actually still massaging my bankroll back into shape after that catastrophe. (The day after that, I started the morning by dumping another 2 buy-ins, and then ended up ahead 2 for the day after a good afternoon.)