The gang goes to jail or the gang gets arrested. Charlie drops LSD Dee has a threesome or dee becomes a lesbian. The gang wins the lotto The gang becomes depressed.
Damn it's hard to come up with a fresh idea that they haven't touched upon. Seinfeld and curb your enthusiasm has pretty much did EVERY funny idea as well.
The gang opens a bank account. Charlie goes awol The gang joins the army Mac gets a sex change The gang becomes bookies The gang is invited to a gangbang. The gang becomes abstinent Mac and Charlie sleep together. The gang finds buried treasure Dennis goes to a sex addiction clinic.
Some of these have already been in the show I think.lol.
The Gang Gets on the No-Fly List - they find out they're all on one or more government watch lists, try to find out why & get off the lists, and make things worse.
The Gang Goes on a Scavenger Hunt - they compete against other teams, and ultimately each other, across Philly to find something and win a prize
The Gang Commits Insurance Fraud - the bar is robbed, or they at least think it was, and they try to cash in on all the valuables that were "stolen". Jewelry, paintings, fur coats, gold bricks, etc.
The Gang Gets Spied On - a hidden camera or microphone is found and paranoia ensues.
The Gang Prepared for Doomsday - the gang becomes "preppers" as only they can.
Dennis Gets Stalked - what Dennis does to women is done to him by an unknown party.
Dennis Goes on the Run - police come looking for Dennis, which he assumes is for something serious that he doesn't specify while the rest of the gang draws their own conclusions as they help him hide and try to get a reward for turning him in.
Frank Gets Indicted - his nefarious business dealings finally come back to bite him.
Mac Finds Mr. Right - he meets a male "friend" who seems to be perfect for him.
Dee and Mac Find Mr. Right - she meets her dream guy but Mac who seems to be perfect for Mac.
Dee Gets Her Big Break - Unlike her role as movie extra or being in that smut film, Dee finally has her chance at stardom........ kinda.........
Charlie Goes to Rehab - Are there facilities for cat food and paint abuse? Apparently so.
The Gang Goes to A.A. - not to get help for alcoholism, but to find more drinking buddies or to con someone
The Gang Escapes a Room - they go to, or end up in, an "escape room" experience where they compete against each other, try to prove who's the smartest, etc.
The Gang Gets Hacked - their emails, text messages, voice mails, internet search histories, phone pics, bank records, etc are leaked.
The Gang Pulls a Heist - Bank, casino, or museum, doesn't matter, but they'll botch it.
Frank Buys a Franchise - he acquires a part of a football or baseball team, but he whole gang thinks they have authority over players and merchandise.
The gang reads a book- charlie screws something up because of his illiteracy and then he says when's the last time any of you read a book. So they all try to read a classic book and they act out how they are interpreting it Dennis drives for Uber- strangers isolated in a car with Dennis. Charlie and frank go to sleep- starts as they close the door to their room and then it's just one full night of them doing everything they would do. The gang goes to a concert- some random 80s singer comes to philly so they go and get into all kind of problems at it