Something that has worked well in Salmon Arm was for the (only) LBS to get on board. Last year, anyone who purchased a new bike got a single Shuswap Cycling Club membership. Adding family members was left up to the new member. I’m not sure how many will renew in January when their memberships expire, but the numbers look pretty impressive in the meantime.
(Um, thinking about this now, I think it was actually 2017 and I may have accidentally let my membership lapse. Note to bike clubs: use a CRM and get those reminders out!)