Any indoor tennis court in Busan? No problem paying. And Tennis lesson
There are two indoor courts in Busan. One is Orange Court, close to Wondong Interchange, and the other is in Namsan Dong, just down the hill from the library. I have taken lessons at both and can give information regarding contact details and lesson pricing if you need. Evenings are ok, but if you want lessons on the weekends, you would be better to stick with the other poster, as the only place I know of where you can register for those is SPO-1 Sports Park in Geumjung-Gu. Orange Court is open on the weekend and if someone is looking for a doubles partner, you can usually just walk in and play. If you would like to reserve the court yourself you will need to call the court and reserve a spot. Unless you do reserve a spot, do not expect to be able to play a singles match anywhere except SPO-1 outdoor courts. Pretty much everyone plays doubles. The tennis culture in Busan is great and plenty of people can speak well enough for you to enjoy your time together if you cannot speak Korean.
firstname.lastname@example.org for more info.