This sign currently visible on the billboard at 22nd Street and 3rd Avenue has a grammar error. An apostrophe followed by an s indicates possession, not plurality. Plurality is indicated by just adding s. Taxis is the correct plural of taxi, while taxi's means something that belongs to a taxi, such as in the sentence "The taxi's front window was cracked." If I were paying a bunch of money for a sign I would want whoever designed it to know their grammar.
As someone who plays poker online I quite like this sign for Anderson's Transmission with its quad Aces theme. After all there are few better hands in many types of poker than quad Aces. Yellow on the other hand isn't a colour I associate with poker.