The Beach Club is across a small "lake" from the Boardwalk. You can walk to it going in either direction around the lake and it will take you five to 10 minutes, depending on exactly where you are going on the BW. There are several options from the monorail resorts to get to the Epcot Resort Area:
1. Take the monorail to Epcot and walk through Epcot out the back entrance (called the International Gateway).
2. Take a Disney bus to Epcot and do the same thing once you are at Epcot.
3. Take a cab.
4. If you have a car, drive to the resort and tell the guard at the entrance of one of the resorts that you are coming to hace dinner at one of the restaurants.