Members of Forehill Bowling Club in Ayr, in Glasgow to play a match, drank from the bar.
Stuart Millar and Thomas McEwan fell out as they left for Ayr, and when they arrived back at their clubhouse Millar, 30, punched Mr McEwan in the face and knocked him down.
Maureen Mullan, prosecuting, told Ayr Sheriff Court: "The accused then kicked Mr McEwan several times while he was on the ground."
The victim suffered a broken cheekbone and his vision had been impaired.His dentures and glasses were also broken.
Millar, 30, of Dailly, near Girvan, Ayrshire, admitted assault, and his solicitor said he had "completely lost the place - no doubt fuelled by the free bar."
Millar was sentenced to carry out to 220 hours unpaid community work.