After Aika, there is (assuming they haven't removed it from Main Mission) the 5 free tickets from going to the Casino. There is also some from Allin's Client Orders that range from playing a game (using the lowest amount to play) once to using a drink stand(one-time only).
The only other way seems to be completing the Main Mission of going to the casino on alts, collecting the tickets and storing them, deleting the alts, and repeat 24 hours after the alts are deleted.
Gee, it's like I've seen this before. A certain class was unable to obtain a certain item after certain UQs died and had to resort to this method, but with maxing a certain character's affinity.
In regards to the CC Ticket at the Swap Shop 2, that takes AC Items/Recycle Badges. 1 for a 50 CC ticket and 8 for a 450 CC ticket.