The phrase "allow a crowd of" is correct and usable in written English.
It can be used when discussing the permission or capacity for a group of people to gather or participate in an event or activity.
Example: "The city decided to allow a crowd of spectators to gather for the annual parade."
Alternatives: "permit a gathering of" or "let a group of".
Thanks to Gilbert Robinson, a coordinator of the exhibition (and later head of State Department public diplomacy in the Reagan years), I arranged to make a certain section of fence disappear, allowing a crowd from the other side to spill in and trapping the official party inside the house.
Kick-off was delayed to allow a healthy crowd of 1,057 to enter Ainslie Park for the division's game of the day.
The party had been reluctant to move the speech since the stadium allowed them to build a crowd of as many as 65,000 people and distribute thousands of tickets to Obama supporters in a state the campaign would sorely like to win a second time.
The outfit, which looked like a crossing guard's uniform, allowed him to sneak past a crowd of Japanese and foreign reporters who had been waiting hours for him to appear.
The appointment of a former MP from the Muslim Brotherhood raised a few eyebrows, particularly after Sheikh Youssef Qaradawy, a preacher close to the Brothers, was allowed to lead Friday prayers for a crowd of 2m in Tahrir Square.
It might, in fact, have become just slightly overwhelming, except that Karl E. Meyer, a former editorial writer for The New York Times, and Shareen Blair Brysac, a television documentary producer, never allow a sensational cast of characters to crowd out the narrative.
Before a crowd of 28,835, Leiter allowed two infield singles in the first inning and no other hits before exiting after five and two-thirds innings.
With the Russian national guard providing security, Ovechkin lifted the cup above his head in front of a crowd of fans, who were allowed to take photos with the trophy.
A crowd of hundreds waited.
Crowd mining Extracting useful patterns from large databases of social sites allows a better comprehension of crowd (large group of people) behavior which in turn can improve possibilities of increasing sale and monetary gains [4, 5].
