4p.m it's usually slower around Sunday afternoon.
Tom's will make arrangements for larger parties. Very early in the morning or very late in the afternoon are the best times.. OR have the party at the Coney Island location. Plenty of parking and you can have a whole section to yourselves!
The earlier the better
7am is best, no later than 8am though
My opinion, I have noticed the crowds thinning post 3pm on the weekends
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