You can choose a convenient time which you can commit to regularly. This can be during the day at work or after work.

This can be negotiated with your employer as part of your professional or self development goals. You may be given the time once a month to attend.

Your employer may a) give you the time once a month to attend your session as part of their commitment. b) pay for your sessions if done outside work time. c) offer to both give you the time to attend and pay for the sessions.

You can certainly still attend. On this occasion, you will simply pay for yourself.