At a bar
One at a time
Sex at convention stage
At a restaurant
At A Frat Party
Your bully found your sister at a cosplay convention and had her drooling on his cock within minutes
Cosplay convention
A Threesome At Oktoberfest
Two at a Time
At A Concert
At a party
At A Restaurant
Some more convention naughtiness
One of those days, I should visit a porn convention