A customer assaulted a bartender at a pool hall April 16. Cops said the customer was looking for his property behind the bar at East Side Billiards, 163 E. 86th St. between Lexington and Third avenues. When the bartender, a 21-year-old East Harlem resident, asked the customer to get out from behind the bar, the customer punched the bartender several times. The unruly patron then told the bartender, â€œI"m taking your tips, and grabbed the jar containing around $40. He also skipped out on his $21 bar tab.