I have a flight LIS-ZRH-NBO which requires a 15 layover in ZRH. I will be staying in the transit hotel in ZRH as luggage will be checked thru NBO.

Question: I am 100% sure I can visit the lounge in and out during my 15 our layover? e.g. get a drink and grab a bite till the lounge closes? And which lounge would work great for this idea?