7 times - an awful lot.
Once I holidayed in Crete with a GF, & we were on the top floor of a 5 storey crappy hotel, & had no window other than one that led to the staircase. We had sex 7 times through the day everyday.
We had no idea that the sound funnelled all the way to the bar downstairs until the bar man said to me, " You are my hero, have this beer free, you need your strength?".
It seemed a little legend spread, coz a day later we got quite drunk & had a public spat, causing the local police to arrive. A local nightclub manager ran over & said "this is the couple with the big passion", & they laughed, & the head cop winked at me & said, "now go & make it up to your woman. In Crete we understand how passion is" & he let us go.
It's fair to say we weren't popular with the rest of the guests, but the hotel manager just said "Fuck them they only wish they were able to enjoy the same".
Sadly I don't think I've had sex more than 3 times on any day since.