Where are you? If you are a solo founder I highly recommend co-working spaces that have other entrepreneurs. Doesn't feel solo anymore.
If you are in Orange County CA check out this place:
We (ZeroTier) and many others are residents. As a bonus it features a 3d printing lab, a martial arts dojo (which somehow fits with hackers), and regular meetings of loads of hacker meetups and hackathons and the like.