Haven't ventured to Prague for sometime (6-8 years) but still relatively well priced in general for getting there and travel when there
Now what you're here for, the Showpark in the city (not by the river) has closed down, and is the first one uber picks up when searching sooo, yeah don't make the same mistake I made firstly.
Uber there, was 2 or so in the morning so roads clear, its an organised spot, security, walled, and in general felt very safe
Pay your entry (can be on card) and off shopping you go, from what I read its the more expensive of places to go but the window shopping experience, just allows you to choose who you want, went around a few times to see if I had missed anyone and finally chose one after 15mins - Spanish, G-cup+ (natural), ok english but set me back 4500 CZK or £150 (she saw me coming a mile off, pretty tipsy making choices) - offered OWO, CIM didn't partake - in general good experience, in and out in 30
Annoyingly when I met with mate who I'd also gone with, who is tee-total, he was charged 2500 CZK including extras
During the trip also stopped at Black Diamond Massage next to the main Praha station, relatively easy, woke up sent a whatsapp, had breakfast, got a message with pictures of who's working, booked and was there in 5, its the back of a police station, so guess safe as can be, £60 / 1700 CZK 30mins with HE, had OW from a 7/10
Lastly bit of warning can't remember the name of it and its not showing on Google, but know exactly where it is - on the corner where KFC/Popeyes off Wenceslas Square, midway during our night out bar hopping offered free entry, headed on into a "stripclub" real shady place, big russian sitting with women around him as you enter, go to the bar, get 2 very warm beers, they bring them over say we've not paid entry (though told free outside), things get a bit heated, big Russian comes along asks for the money, I say look there's 11 more coming do a price for all of us with a bottle, he eases off, we go for a "cig" and don't return.
Also we were the only people in there.
Didn't get much time to go into it more, but next time will try Neon Club which was recommended by some guys we met