No trip for me till June but that is to AC. Need to recharge as well as find Vitamin M!
There are lots to do even alone in Pattaya. I normally schedule with friends half the trip and alone the other half during Songkran and Loy Krathong.
When alone , its good time to explore coz there are no expectations from your frends. Since you're no longer a newbie to the place , you can take your time to find some gems away from Soi Walking but it'll always be there as a back up in case you want instant kopi.
LK Metro now has 4 or 5 agogos and the surronding areas boast the beerbars ; like Soi Diana and Soi Lengkee. Walk further up towards the disco Xycte and you have even more bars t explore ; although the concentration is less. Check out Bliss BJ Bar and Buffalo bar so Sai 3.
Try Drinking Street also near Big C, a plesent surprise for me last time. As for food , go for the Oishi group jap buffet ; I think called Shabuhsi. Individual steamboat ; less than 200B. The place at Central 6th floor is always packed but there is another on at the Big C.
Not sure about seafood as I normally eat cheap in Pattaya. The Jontiem ones along the beach are famous but some are not cheap. Can pick up a girl and ask her to bring. Last time I did that , she brought me to Lobster Pot ; expensive and food was very ordinary , not worth it
I normally spend at least 6 hours at VIP suana ; boss there was from HK and does not allow hanky panky on his premises. Very good massages and the steam/hot stones/tub usage is 150B per entry with free with water melon and water to drink. Massage is seperate , off course. A good place also to meet people as normal and bar girls as well as tourist and expat use the place. Its in the middle of Soi 10