Summertime small business guerrilla marketing ideas:

1. **Chalk Art**: Use colorful chalk to create eye-catching designs and messages on sidewalks near your business or in popular gathering spots. This can grab attention and direct foot traffic to your location.

2. **Beach Towel Branding**: Create custom-branded beach towels featuring your business logo or slogan. Distribute them at local beaches or outdoor events, turning sunbathers into walking advertisements.

3. **Pop-up Lemonade Stand**: Set up a pop-up lemonade stand outside your business or in high-traffic areas. Offer free lemonade and use the opportunity to engage with potential customers and promote your products or services.

4. **Outdoor Movie Nights**: Host outdoor movie nights in a park or vacant lot, featuring classic summertime films. Set up a branded concession stand to sell snacks and drinks, and use the event to showcase your business to attendees.

5. **Flash Mob**: Organize a surprise flash mob in a busy public space, choreographing a dance or performance related to your business or products. Film the event and share it on social media to generate buzz and attract attention.

6. **Street Performers**: Hire street performers like musicians, dancers, or artists to entertain passersby near your business. Incorporate your branding into their performances to create memorable interactions with potential customers.

7. **Outdoor Fitness Classes**: Offer free outdoor fitness classes in a park or public square, such as yoga, boot camp, or Zumba. Use branded signage and promotional materials to raise awareness of your business while providing value to participants.

8. **Guerrilla Gardening**: Beautify public spaces by planting flowers or creating small gardens in neglected areas, while subtly incorporating your business branding into the landscaping. This can improve the local environment while also promoting your brand.

9. **Sidewalk Sales**: Host sidewalk sales outside your storefront, offering discounted products or exclusive promotions. Use colorful signage and decorations to attract attention and draw in foot traffic.

10. **Summer Scavenger Hunt**: Organize a summer-themed scavenger hunt that takes participants on a tour of local landmarks or businesses, including yours. Offer prizes or discounts to participants who complete the hunt, driving traffic to your location and increasing engagement with your brand.

These guerrilla marketing ideas leverage the summer season to create memorable experiences and promote your small business in creative and cost-effective ways.