Sentence:  By one o'clock the place was choc-a-bloc. ... The restaurant was packed, and the promenade between the two main courts and the subsidiary courts was <WSD>thronged</WSD> with healthy-looking youngish people, drawn to the Mecca of tennis from all parts of the country. 
Meaning of the word marked with <WSD> tags:  To crowd into a place, especially to fill it.