You can learn common expressions at the tea house:
jǐ wèi : how many people are you? wèi : measure word, useful in restaurants. chá guǎn : tea house rè nào : lively; intense activity; many people fēng sú : custom shēng yīn : voice shēng yīn tài dà le : the voices are too loud xí guàn : to be used to ... liáo tiān : to chat gōng gòng chǎng suǒ : public fú wù yuán : waiter
Note the subtitles are not always exactly synced to the spoken words.
This video (see at YouTube) is of medium level difficulty. It has subtitles in Chinese characters.