Re: Can a session last 4 hours?
I've gone 4 hours pretty often, and - so far - almost always with Starbuzz. Admittedly, I normally get about 3 hours off a 15-20 gram bowl, but yes, 4 hours is certainly possible.
I suppose it's testament to the amount I smoke that 4 hour sessions don't bother me. I often write while I'm smoking, and the hookah allows me to stay focused on my writing. The longer the bowl lasts for me, the better.