Yes, but you need a valid reservation for a train. 

ČD Lounge waiting area

Special ČD Lounge waiting areas are intended for passengers:

• with a valid 1st class ticket
• with a valid 2nd class ticket in combination with a reservation for a higher-quality train (railjet, SuperCity, EC, IC, EN, Ex, Rx), an SC or railjet Business reservation, or a sleeper or couchette supplement for a higher-quality train
• with the IN 100 or IN Business customer application on an In Karta card
• with children under 10 years of age
• pregnant women
• with a valid ZTP or ZTP/P card

There are ČD Lounge waiting areas at the stations Praha hl.n., Pardubice hl.n., Olomouc hl.n., Ostrava-Svinov, Ostrava hl.n., Břeclav and Brno hl.n. Here you can relax or read the daily press before continuing on your journey. In all ČD Lounge waiting areas, your children can amuse themselves in new kids’ corners. We also offer a free internet connection in ČD Lounge waiting areas. Each ČD Lounge waiting area is dedicated to a prominent personality connected with the railway or the region.

Come visit a ČD Lounge waiting area to pleasantly pass the time until your train departs and learn something new.

Yes but dont expect to much it´s just a Coffee machine and a water dispenser :) 

I prefer to stay in the old station hall in the Cafe :)