How about a camping site?
Located near or on the edge of a beach. Set up a few tents, add a shower block and some toilets, barbecue area, swimming pool, small clubhouse (bar food, drinks & dancing), amusement arcade, children's play area (something for them to do whilst parents relax in the bar). These sort of things are very common in SW UK.
Oh, just thought - something like this already existed when I visited Egypt & SimStar3 has suggested an arcade - so this isn't really anything totally new.