The length of meetings varies more than in any neighboring area. Some schedules are built for short dates during business hours, taking advantage of how many people come through for work or errands, and others only take long bookings, arranged a day ahead. Ask about the format when you write, because few handle both.
As for what's offered, the range runs from massage to companionship for a dinner or an event, taking in the girlfriend experience, with more conversation and less protocol. Every ad lists its terms and its limits, and respecting them exactly as published is what makes the meeting work out for both sides.
Arranging is direct: you write to the WhatsApp number on the profile, confirm time and duration, and only then do the address and apartment number arrive. Nobody has any reason to pass you those details through another person. If someone tries to handle the contact through a different channel, the prudent move is to break it off and go back to the listing.
Before deciding, give the ad a moment: recent photos, a complete description and details that line up with each other say more than any promise made by message. If something doesn't add up, move on, there are plenty of options. And don't renegotiate terms on arrival, because what was agreed in writing is the only thing that really counts.