I play a lot in Black Hawk/Central City. Only the 2 "Golden" casinos offer surrender. Two CC casinos have S17 games, Johnny Z and Century. Tables tend to be crowded with lots of ploppers. Most casinos close table games early am and reopen them at 11 am or noon except for Ameristar, Lodge, Lady Luck, Isle, and Monarch which are 24/7. Best hours to play are 7 to 9 am and 12 to 2 pm. 6 deck shoes mostly offer good penetration, cutting off less than one deck. Minimums are mostly $5 with a few $10 games.
Ameristar also has $15 and $25 minimum tables. Max bet is $100 oer hand in all casinos by statute. Free food is easy to get. Free rooms are possible on weekdays if you put in enough time.