No admission charge at all. They are all part of Downtown Disney (DTD). You just enter DTD from the parking lot and wander around. It's kind of like a separate 'park' with shopping and dining. We've eaten at Raglan Road and Earl of Sandwich and both were excellent.
Honestly, there no longer is a Pleasure Island. The clubs closed last year. That's what the admission was for. The restaurants located where PI used to be do not require admission.