Most Likely
1. Miyeon
2. Shuhua
3. Minnie
4. Yuqi
5. Soojin
6. Soyeon
Least Likely
Miyeon & Shuhua: Since these 2 really like skinship I think they'd also be into PDA. They wouldn't mind holding hands, etc. in public.
Minnie & Yuqi: I think with these two it depends on their partner. If they're dating someone that likes PDA they would probably like it as well and if they're partner doesn't they wouldn't force them into it.
Soojin & Soyeon: These two like skinship but would probably prefer to show you their love in private. Therefore I don't think they would be very fond of PDA.