Looking at your booty in the mirror will not make it grow. Working out does.

About the owner

Hi, my name is Ortál Vriend, graduated actress based in the Netherlands. 
Acting means being vulnerable.
As camera’s surround you all the time while doing your job, it’s important to look good but most of all, feel even better in your own body. Some roles requires to have a good stamina (such as a cop or professional athlete). While for other scenes it’s important to feel confident about your body shape (think of a swimming pool scene or an intimate love scene).
There’s no hiding the fact that when you feel good about yourself, your performance improves no matter the career choice. 
For me, working out was and is the best way to create that for myself (and of course healthy food, but hey, who doesn’t like chocolate and ice cream once -or twice- in a while).
The strength to feel good in your own body  is what I want to give other women (and men) as well.

About B|f

Since life is as serious as it is from itself, in those classes we can definitely guarantee a smile on your face while you’re burning your ass off. Two flies in one clap, as the Dutch would say. This is the place where you can totally be yourself, feel as feminine and fearless as you ever wanted to be.

In a world where we constantly compare ourselves with others, this is the place where you can let that inner beast out and amaze yourself with a strength you didn’t even know you had it in you. With other women surrounding you, you’ll feel empowered by each other. You can be your lovely self, do your little dance in between the exercises and enjoy every song we pick out carefully.

The classes are full of energy, joy and not to forget: lotssss of booty burns. 

Work hard, enjoy just a little bit harder. We got you.


Working out is the best way of getting over your hangover.



When life gives you 2 billen, use them.


Prices incl. BTW/VAT.


  • 1 Ticket


  • 1 Ticket


  • 5 Tickets


  • 10 Tickets

Of course you can have your junkfood babe, just make sure you workout before.


What our customers say about Butt Factory


Life isn’t all about booty workouts. But it damn right should be.

Perfect combination of core, butt, leg & cardio training. The music is very carefully picked, matching every workout. The trainers are super enthusiastic. I'll be back every week!

These classes are so much fun, feminine and original. During summer we work out on the beach and during winter in a club or pub. Pumping afropop beats with a night environment makes this one a very fun class. And it's a really good training for what is promises you: butt abs, legs. With movements that you can mirror from instructor Ortál. She's fun!

Fantastische workout! Zelfs als je geen hockey speelster van 21 bent zijn de lessen goed te volgen. Vol enthousiasme en kennis zijn de lessen opgebouwd. Gegarandeerd 🔥🔥🔥

It’s my second time with B|F. I loved the teacher’s energy and music, and definitely felt my body the next day.

Ortál maakt er echt een feestje van. Haar energie is top en tussendoor ook nog gelachen. Op het eind een B|F signature ginger shot gekregen en lekker met brandende billen haar huis.

Mijn vriend vind na twee lessen al mijn booty verbeterd 😅 ik vind het vooral een leuke les!

Best group class ever! You see the difference within a few weeks. Both Dutch and non-Dutch speakers friendly!

Top les! Ortál is een super leuke en goede lerares, echt top. Persoonlijke aandacht en goede vibes, zo zie je het niet vaak in Amsterdam.

The class was really great and pumping, great music, the energy of the teacher was on fireee, ánd got a ginger shot at the end which concluded nicely the workout.

Wat een super leuke les! Energieke, lekkere muziek en precies de oefeningen die je wil. De trainster motiveert je en duwt je net even over het punt dat je wil opgeven. Aanrader!

Na elke les een lekker gevoel! Afgemat en voldaan. Goede energie en muziek de hele les lang. Absoluut een aanrader

Heerlijke energieke muziek die je door de workout sleept! Oefeningen zijn top, ik loop blij en voldaan de les uit!

Ortál is top! Elke les weer andere muziek en oefeningen die goed worden uitgelegd:) Heerlijk!

Een workout in de kroeg (Den Haag): geweldig! De combinatie van lekkere muziek, motiverende trainer en duidelijke uitleg maakte het superleuk. Iedereen wordt aangemoedigd om het beste uit zichzelf te halen. Een topervaring!

Great workout. Love the music, motivating teacher, great exercises: just perfect!


    No more buts. Just butts.

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