who can recommend a very decent / nice hotel in TJ where I can do an overnighter with a local girl?  and does anyone have any fresh young faces that would be good choices?

There are a number of them. I prefer the Hotel Pueblo Amigo. Some guys prefer La Mansion. There are others that are nice and will suit your purpose but I am not familiar with them. As for the fresh faces... generally speaking, most club girls won't want to do an all nighter unless you pay very good money as they can make good dollars in their going up and down the stairs from the bar. But when it gets late and business slows down, make an offer they can't refuse. My guess is most of the internet girls would want to meet you before making an all night date. The only "fresh" face among them is Noemi, a very nice lady, new to the biz and will date like a girlfriend if you treat her as such.

Hotel Lucerna is an excellent choice.  I booked ahead a few weeks back for a Saturday night stay - total cost for one night was $80.00 and I had a lovely lady show up on Sunday morning straight to my room with no problem and I would doubt there would be any problem with an all night companion joining you.  The shower was impressive for TJ - very hot water and good pressue and the hotel's towels were large and soft.  Good bar and restaurant in the hotel also and nice views from balcony rooms of pool and patio.  $5 cab ride from the border.  Book ahead on the Net and save a few bucks.  The entire staff speaks excellent English.  Lencho/Larry