Basically this.
Also, if there's a CM in your area, offer specials to anyone that comes in with a map of that night's route. Put helmet hooks on the underside of tables and the bar. Selling tubes and chains would be rad. If you're serving food, be sure to have a good vegan/vegetarian selection. Messenger specials. Have a bike rack just for regulars with their names on it. Have a house lock or two in case someone forgets theirs. Make sure you have a floor that won't get scratched by cleats/isn't too slippery for road shoes. Or, give away hospital-style booties to throw over SPD-shoes so that people can walk around without skating/scratching the floor. Good beer. Sell gels and **** just in case people stop by on long rides. Have jerseys or caps made with the bar logo. have stuff that relates to the cycling season I.E., during TDF have specials on French beer, during the winter have hot toddies, in the fall put grass and dirt all over the place so the CX dudes feel at home.