For first time visitors : You`ll come across these words and although obvious to most, maybe not so to someone new to Pattaya/Thailand and boards related to such. Some places, only a few(in Pattaya anyway) will charge you extra when you bring back a lady to spend the night, or a couple of hours with you in your hotel room. Hence the expression guest charge or joiner fee. "guest friendly" - more or less the same thing,doesn`t relate to whether they are friendly to you as the booked guest but as to whether they charge you extra for bringing back a companion for the night, but can also give an indication as to how your "friend for the night" will be received/treated. Then you`ve got some that may indicate an "extra guest/joiner fee". If you`re feeling energetic and want to bring back 2 companions for the night/hour or so some places charge extra for that although some don`t always apply their rule. One thing I`ve noticed is that a few hotels that come as part of a package holiday sometimes are not guest friendly. Only an observation and certainly not written in stone. How do you find out your chosen place` policy? Send an email asking them,they`ll have been asked before. Post up on here, someome will likely know the answer.