Discoverer,
Nordic Tugs 37 and 42 usually have 2 staterooms (I do know of one or two NT 37's that were only 1 cabin however these are rare as Hen's teeth

) and some do have flybridges. Ours had bunk beds in the 2nd cabin, so in theory could sleep 3 in that space. Our galley seatee could be made into a double as well. For us, the NT 37 was a great cruising boat for a couple with occasional guests (2) for short visits. It only has 1 head.
Like most boats without active stabilization, our NT 37 did not like beam seas!! However, with course changes, speed changes, and also avoiding "nasty" weather as much as possible, we found Pilitak to be good in most sea conditions. We have crossed the Georgia Strait (dating myself) several times in 1 - 2 meter short chop (stacked up) following seas (winds plus 20 knots) without a worry, although there were some uncomfortable moments usually when a wave pushed us toward a beam sea position more than I would like creating additional momentary roll. One time we were in a channel up near Ocean Falls going into 30+ knot headwinds with no issues or discomfort. All in all, I would say that NT's are good coastal cruisers and can handle most (reasonable) sea conditions. They have been taken down the coast to Mexico (I know of 3 AT 34's that left our area and ended up in the Carribean/South Florida area), so with good weather routing this has been done. We cruised our Tug at 7+ knots, but at WOT and fully loaded with supplies, she could make 15 knots. I feel that having the option of additional speed and power when wanted was a great feature giving more options especially in lumpy seas.