Hotel in Hanoi

[karius]

Can anyone recommend a 4 star hotel in the old city center in Hanoi? Preferably a hotel where I can have guests visit if I meet someone online.

[Moses]

Solaria Hotel Hanoi 4****
small and cozy, rooftop bar, breakfasts are there as well
gay bar just behind the corner
50 meters to lake with Confucian temple
in the center of old city