Generally calling stations can be defined as loose passive, my notes on loose passive players that I have saved are a general outline of what we can do to play against them, I used to go over them until it become common knowledge:
They will generally call bet after bet relatively loosely yet only bet and show aggression with their stronger holdings, both pre flop and post flop.
Generally, there is little incentive to move these players of off a hand as any raise is not likely to generate fold equity, thus consider limping marginal holdings pre flop, and betting strongly for value when appropriate.
For this reason we should recognise when our hand is best and bet relentlessly when it is, it is as simple as that.
This term refers to the general loose calling station type players, who can be difficult to play against.
Two very important things that should be remember is that we are looking to minimise the risk to our own stack while increasing the value we do get from our made hands. Thus it is essential that we do not bluff these kinds of players, as they are often likely to call very thinly. Bluffing does not requisite any fold equity. This is also applicable to continuation betting, this play should be totally disregarded in all situations against these players as we are in essence sacrificing equity to the villain.
We do however need to consider and apply thin value betting, these specific players have tendencies to call down with hands like any pair or Ace high in most situation so ideally we need to be betting our more marginal hands in order to extract value. Though it may seem like a good idea to bet less with these marginal hands, if anything we should be betting larger as a large majority of the time we are going to have a superior hand thus it is logical to extract the maximum perceived value possible, folding if played back at
Hero calling should also be avoided, these villains generally play passively however when they do turn up their aggression we should be wary and willing to fold all but the better hands in our range, though we may perceive the villains range and make a hero call accordingly these is actually a false play as it is extremely difficuilt to put these types of players on any hand, thus we should give up any hands that we encounter aggression in.
We should consider tightening our button raising range, and also increase our bet sizes with hands that we can extract value from. This also means making our post flop bet sizes relatively large, and as previously mentioned folding to any aggression. Also consider including limping with certain hands, and betting in accordance with the connection on the flop, checking from the blinds is also preferable with more marginal yet playable holdings.
Generally we are going to be keeping pots small and check folding marginal holdings or missed hands and playing our better holdings more strongly and aggressively for value.