I need to rig up a hotel so that all users can have wireless internet in their rooms and be charged for that.
I was thinking to install a RB133 on each floor with WDS with a RB532A in the office with usermanager loaded to manage users with a hotspot service and NAT incoming internet.

• Is Rb532A enough hardware for usermanager (max 20 users at a time)?
  Is it easy to make RB133 do WDS so roaming is possible and to later extend with more radios if there are dead -spots for reception?
  Any advice that I might need to look at?

Thanks
Ekkas

Yes, RB500 should be enough for 20 clients.
It is possible to add another card to RB133, if you do not have 133c.

Could you please explain how can we make a WDS system with RB532. i read referance manual but cant do it. Please help me.

Best Regard

Which configuration are you interested in ?
WDS allows you to achieve roaming scenarios, transparent network over wireless, repeater etc.
You will find some interesting examples here,
http://wiki.mikrotik.com/wiki/Wireless_Setups