Translation of irregularity in Spanish

One hour later people were starting to leave and we did not exactly understand why. We took another drink and I paid the bar man cash. Later it turned out that the change he gave me would be fake money.
We joined the mass and climbed it. The stones were a little slippery and I doubt that this place is accident free. Climbing big slippery stones was not an easy task but we managed it slowly.
The type of exercise was new to me and I think it worked great. How are things in your country and in your city? Do you also have Thanksgiving holidays? I enjoy my free time at home with my kids.