If you really need a 2 bedroom suite I can highly recommend the following approach. It does not work every time but in the vast majority of cases it does get you what you want with minimal hassle.
1. Find a desirable hotel with a two bedroom suite.
2. Book said 2 bedroom suite.
3. Check in to said 2 bedroom suite.
4. Stay in the 2 bedroom suite that you checked in for.
5. Check out and pay for the room catergory needed.
6. Anything else is a bonus.