Please capitalize where necessary: please note that the gym and the spa area including the hot tub are closed due to maintenance work. as of 01 april 2017 it will be available again.
A: Please note that the gym and the spa area including the hot tub are closed due to maintenance work. As of 01 April 2017 it will be available again.

Please capitalize where necessary: other games like cooking masters
A: Other games like Cooking Masters

Please capitalize where necessary: the protocol allows for combined treatments where the retina is first electroporated and then treated with substances.
A: The protocol allows for combined treatments where the retina is first electroporated and then treated with substances.

Please capitalize where necessary: two double rooms connected by a fully equipped kitchen and bathroom.
A:
Two double rooms connected by a fully equipped kitchen and bathroom.