No sordidly clothes, just gloves mandatory, once I forgot my boy's corderoy pants and he went in with school pants...
Skates are loaned there, as well as helmets
It is great fun, and from mon-thurs you can stay and skate after the class for only 6€ ( I think)
The cafeteria is great, a place to recommend.
The only thing is that skating on Friday/sat/Sunday is pricey ( I think 14 or 16 €/ person, so for me with my two kids it was too much for two hours that they would stay.
Ask me more if you need.