A: Yes the strippers will offer additional dances on tips if the party is a good party. The entertainers make most of their money on tips, from doing lap dances, exotic acts, and the creative list goes on. If an female entertainer does not offer lap dances after completing her show then he must have a damn good reason, so be good.
The female stripper will generally offer lap dances right after the show, it's best to act fast. They'll ask once or twice, if they do not get a response, they will wrap up the show and move on to their next engagement.
Remember to remind your guests to bring some extra cash for lap dances and tipping the stripper!