$5 table at the Borg
There was actually a second $5 table open at the Borg last time I was there-- it was in the Asian area and opened up at around 2PM. There were even open seats there when I saw it, but I imagine they filled up fast. There are usually several $10 tables in each of the 3 pits at the Borg on weekday afternoons/ early evenings, all 6-deckers. You may also want to check for $5 tables at the Sands-- I've seen them there in the past. There are usually $10 tables available on weekdays everywhere in town except for Caesar's, Showboat and Trump Plaza and Marina, though you may have more trouble finding them during the summer. The games at the Hilton are worth the walk-- better pen than most stores, and sometimes a few 6-deck $10 tables open during early afternoons. Good luck!