OP enjoy your trip, if you like glamour barbies then Artemis is the place to visit, there are more barbie types than just Jenna, she's only just back to work after a year off, she is one of the only Artemis ladies who uses social media to attract punters, though her Instagram profiles been deleted recently, depending at what time you arrive at the club, you don't always have to book Jenna, In fact I've never had to book her in advance, she's there from 11am as stay in the dorm and not to busy until the evening, so top tip is go in the afternoon before she becomes busy, Jenna stops working after midnight usually, but there are other girls to pick from. I'd leave your phone and valuables in your locker if I was you, easy for another guy to wrongly pick up your robe if you go shower or sauna. I usually spend all day in a club, and don't rush for a first session, arrive about midday, eat some brunch, have a drink in the lounge, scope out the available girls, it's usually not so busy yet, especially after a big night, but gradually the girls that live up in the dorms come down, you can sit in the lounge and perv over the naked young women walking around trying to tempt you to fuck them, or go for a swim indoor or outdoors, take a sauna, sit in one of the porn kinos, girls will come round offering to blow you, there is even a gym if you want to work out. It starts to pick up after 6pm as girls living outside the club come into work.
As been already said you can chat to other guys, as many speak English at Artemis, as it attracts a international crowd, you might even get some top tips, also you can leave the club and return without having to pay again, just let reception know, if you're staying up in Alex platz do the obvious walk to Brandenburg gate and Reichstag.