Tyga pulled a no-show for a club appearance when the place shot down his demands to get his underage GF Kylie Jenner into the West Hollywood hot spot.

Sources at Greystone Manor tell TMZ … Tyga begged and pleaded with promoters to get 17-year-old Kylie admitted — calling several times throughout the day. We’re told he even pushed his arrival time to 1:30 AM while trying to negotiate Kylie’s entry.

When the club wouldn’t budge — y’know, because of the law and stuff — he bailed.

We’re told Tyga pulling out of the event pissed off a liquor sponsor in a big way. The club is trying to reschedule, but since the 21-and-over rule isn’t changing … seems pretty hopeless.

They may wanna call him back … in four years.