This thread makes me so happy! I'm newish to pole so haven't been able to contribute much to these forums, but I know about this!
They may or may not take you through a warm up. Get there early so you can do your own just in case. They'll then teach you one or two combinations, then have you break down into groups to show it. They'll put you in place, and have you do it once or twice through so they can watch everyone in your group. They're looking for technique, stage presence and how fast you can pick up choreography.
Some tips.
1. Get there early! They'll probably take you in the order you get there, and I personally find waiting horrible. You cool down and work yourself up, and its just not good.
2. Be friendly. You're auditioning for a team, not a solo. They won't want a diva on their company, so be a team player. Don't try to intimidate anyone, and be nice to everyone. You never know who knows who in the dance world.
3. Most important, your audition begins the moment you walk into the building and ends when you leave. Be on time, walk with confidence, smile, be attentive, be ready to respond to requests.
4. Wear something you're comfortable in, and practice your hair style. (Fixing your hair during a combination can be distracting).
5. Don't lie on your résumé. They might ask for special skills, like tumbling or flexibility or turns. You might have to show them, so write what you can definitely do.
Don't take things personally. Maybe they want a company of all blondes, or all dancers over 5'10. Some times it can be a look or type and have nothing to do with your skill.
Have fun! At the very least, an audition gives you a chance to perform. You'll make connections, see lots of interesting sights, and you can show off your skills. Good luck and let us know how it goes!