Crowd into
Definition 1 of 2
Pro Tip 1/3Physical Space
Used when many people enter a limited space, often leading to crowding. 
Fans crowded into the stadium to watch the match.
Pro Tip 2/3Sudden Gathering
Implies a sudden or rushed movement of people into a space. 
People crowded into the shelter as the storm approached.
Pro Tip 3/3Possible Discomfort
May suggest a lack of comfort or personal space. 
Commuters crowded into the train, with little room to move.