They sign up

When they talk on the phone. A girl picks up the phone. They tell her the escape room was planned for this evening. And if they wanted to cancel they had to fill in the form they just got. Everything was already payed for so they didn't have to worry about that part.

She tells her they should be there at 8 'o clock this evening if they decide to go though with it. Then hangs up the phone.

That afternoon the girls just hang out in the city and check out some shops. They think about the escape room offer for the whole day but that afternoon they just decide to go for it because they were too curious to just let this one go.