This really depends on you. We currently have four meetings a year, which is the more formal part of the proceedings (the ceremonies) and they mostly start at 5.00 pm followed by meeting in the dining rooms for a three course meal and wine. These meetings are held on the third Wednesday in October and January and the fourth Wednesday in March and May. These dates remain the same every year.
As the saying goes, the more you put in the more you get out, so we have, from September to June, fortnightly on a Monday, starting at 8.00 pm, workshop or instruction meetings. These are in a relaxed atmosphere where members learn more about Freemasonry and to master the ritual performed in the ceremonies. These are not essential, but they do enable you to learn and practice in a friendly environment while getting to know your fellow freemasons. Some Mondays we get together and just attend a social event, such as meal at one of the local pubs. We also have a summer barbeque and a Ladies Weekend where our partners and family are invited to join us.
You, can if you so wish, get great pleasure in visiting other lodges, making new friends and seeing different traditions followed.
So in summary, you join for your own enjoyment, the four formal meetings a year and from there it really does depend on you.