As for what I want to mean with crawl is obviously front crawl.
RivellaFan: if you have just started I strongly suggest you to stick with beginner swimming lessons. It is much better to learn the basics now that you don't have experience rather than wait and learn to swim by yourself. When you begin, you are at an early stage and you are "in time" to correct and adjust all the movements without too much pain. For someone who used to swim "improperly" for, let's say, a few years, it will be much more painful and difficult to repair the situation compared to a beginner. Anyway, for me it's no problem to swim with you, but we'd have to swim on different lanes, otherwise we might speed down other swimmers.
Jemma: are you a backstroke champion?

Jokes apart, is Schwimmbad Oerlikon a good location for you? If yes, do you have problems to start swimming around 19.30? I usually never stop working before 18.30 and it would be impossible for me to be into the water before that time.
Lob, you are not into the group?
Fabio